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<div class="pre-content"><div><div class="bk_prnt"><p class="small">NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.</p><p>Adam MP, Feldman J, Mirzaa GM, et al., editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2025. </p></div></div></div>
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<div class="main-content lit-style" itemscope="itemscope" itemtype="http://schema.org/CreativeWork"><div class="meta-content fm-sec"><h1 id="_NBK1359_"><span class="title" itemprop="name">Congenital Diaphragmatic Hernia Overview</span></h1><div class="contrib half_rhythm"><span itemprop="author">Mauro Longoni</span>, MD<div class="affiliation small">Assistant Professor of Surgery, Harvard Medical School<br />Assistant, Massachusetts General Hospital<br />Boston, Massachusetts<div><span class="email-label">Email: </span><a href="mailto:dev@null" data-email="ude.dravrah.hgm@inognolm" class="oemail">ude.dravrah.hgm@inognolm</a></div></div></div><div class="contrib half_rhythm"><span itemprop="author">Barbara R Pober</span>, MD<div class="affiliation small">Pediatrician, MassGeneral Hospital for Children<br />Professor Emeritus of Pediatrics, Harvard Medical School<br />Boston, Massachusetts<div><span class="email-label">Email: </span><a href="mailto:dev@null" data-email="ude.dravrah.hgm@arabrab.rebop" class="oemail">ude.dravrah.hgm@arabrab.rebop</a></div></div></div><div class="contrib half_rhythm"><span itemprop="author">Frances A High</span>, MD, PhD<div class="affiliation small">Division of Medical Genetics<br />MassGeneral Hospital for Children<br />Department of Surgery<br />Boston Children’s Hospital<br />Boston, Massachusetts<div><span class="email-label">Email: </span><a href="mailto:dev@null" data-email="gro.srentrap@hgihf" class="oemail">gro.srentrap@hgihf</a></div></div></div><p class="small">Initial Posting: <span itemprop="datePublished">February 1, 2006</span>; Last Revision: <span itemprop="dateModified">November 5, 2020</span>.</p><p><em>Estimated reading time: 39 minutes</em></p></div><div class="body-content whole_rhythm" itemprop="text"><div id="cdh-ov.Summary" itemprop="description"><h2 id="_cdh-ov_Summary_">Summary</h2><p>The purpose of this overview is to:</p><dl class="temp-labeled-list"><dt>1.</dt><dd><p class="no_top_margin">Describe the <a href="#cdh-ov.Clinical_Characteristics_of_Conge">clinical characteristics</a> of congenital diaphragmatic hernia;</p></dd><dt>2.</dt><dd><p class="no_top_margin">Review the <a href="#cdh-ov.Genetic_Causes_of_Congenital_Diap">genetic causes</a> of congenital diaphragmatic hernia;</p></dd><dt>3.</dt><dd><p class="no_top_margin">Provide an <a href="#cdh-ov.Evaluation_Strategies_to_Identify">evaluation strategy</a> to identify the genetic cause of congenital diaphragmatic hernia in a proband (when possible);</p></dd><dt>4.</dt><dd><p class="no_top_margin">Review <a href="#cdh-ov.Management">management</a> of congenital diaphragmatic hernia;</p></dd><dt>5.</dt><dd><p class="no_top_margin">Inform <a href="#cdh-ov.Genetic_Counseling">genetic counseling</a> of family members of an individual with congenital diaphragmatic hernia.</p></dd></dl>
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</div><div id="cdh-ov.Clinical_Characteristics_of_Conge"><h2 id="_cdh-ov_Clinical_Characteristics_of_Conge_">1. Clinical Characteristics of Congenital Diaphragmatic Hernia</h2><div id="cdh-ov.Clinical_Description"><h3>Clinical Description</h3><p>Congenital diaphragmatic hernia (CDH) refers to a developmental defect of the formation of the diaphragm that, in most individuals, is evident at birth. CDH is characterized by: (1) incomplete formation/muscularization of the diaphragm resulting in absence or deficiency of the diaphragm, or (2) eventration resulting in elevation of a portion of the diaphragm that is thinned as a result of incomplete muscularization. The prevalence of CDH is estimated at 3-3.6/10,000 live births [<a class="bk_pop" href="#cdh-ov.REF.wang.2011.995">Wang et al 2011</a>, <a class="bk_pop" href="#cdh-ov.REF.wright.2011.144">Wright et al 2011</a>, <a class="bk_pop" href="#cdh-ov.REF.stoll.2015.281">Stoll et al 2015</a>, <a class="bk_pop" href="#cdh-ov.REF.burgos.2017.522">Burgos & Frenckner 2017</a>, <a class="bk_pop" href="#cdh-ov.REF.shanmugam.2017.1451">Shanmugam et al 2017</a>].</p><p>Infants with CDH often present in the neonatal period with severe respiratory distress.</p><p>Presentation after infancy, occurring in 5%-10% of affected individuals, includes respiratory distress, such as from pleural effusion due to entrapment of the bowel in the chest, or gastrointestinal distress, such as abdominal pain from chronic or intermittent intestinal obstruction. About 1% of individuals are completely asymptomatic and the defect is discovered incidentally on imaging studies [<a class="bk_pop" href="#cdh-ov.REF.bag_aj.2005.478">Bagłaj & Dorobisz 2005</a>].</p><p>At least 10% of individuals reherniate following initial surgical repair; the risk is considerably greater among those whose hernia repair required a prosthetic patch.</p><p>Although CDH is classified into several types, distinction among hernias can be problematic. An anatomic depiction of the normal diaphragm is presented in <a class="figpopup" href="/books/NBK1359/figure/cdh-ov.F1/?report=objectonly" target="object" rid-figpopup="figcdhovF1" rid-ob="figobcdhovF1">Figure 1</a> and anatomic descriptions of diaphragmatic defects are presented in <a class="figpopup" href="/books/NBK1359/figure/cdh-ov.F2/?report=objectonly" target="object" rid-figpopup="figcdhovF2" rid-ob="figobcdhovF2">Figure 2</a>.</p><p><b>Posterolateral (Bochdalek) hernia</b> of the diaphragm is often accompanied by herniation of the stomach, intestines, liver, and/or spleen into the chest cavity. An extremely large defect, or apparent absence of the hemidiaphragm, is called agenesis of the diaphragm; this defect probably represents the severe end of the Bochdalek hernia spectrum.</p><p>Posterolateral hernias comprise approximately 80%-90% of all CDH and appear to fall into two types:</p><ul><li class="half_rhythm"><div>A diaphragmatic defect accompanied by an absent or extremely deficient rim of posterior and lateral musculature (see <a class="figpopup" href="/books/NBK1359/figure/cdh-ov.F2/?report=objectonly" target="object" rid-figpopup="figcdhovF2" rid-ob="figobcdhovF2">Figure 2A</a> and <a class="figpopup" href="/books/NBK1359/figure/cdh-ov.F2/?report=objectonly" target="object" rid-figpopup="figcdhovF2" rid-ob="figobcdhovF2">2B</a>)</div></li><li class="half_rhythm"><div>A diaphragmatic defect with an intact rim of posterior and lateral musculature</div></li></ul><p>About 85% of Bochdalek hernias occur on the left side, about 10% on the right, and approximately 5% are bilateral.</p><p><b>Non-posterolateral (non-Bochdalek) hernia.</b> Anterior defects of the diaphragm can occur in the midline, on the left side, or the right side. Several distinct subtypes are described, with considerable overlap in the anatomic location.</p><ul><li class="half_rhythm"><div><b>Morgagni (Morgagni-Larrey) hernia</b> is an anterior retrosternal or parasternal hernia that can result in the herniation of liver or intestines into the chest cavity (see <a class="figpopup" href="/books/NBK1359/figure/cdh-ov.F2/?report=objectonly" target="object" rid-figpopup="figcdhovF2" rid-ob="figobcdhovF2">Figure 2B</a>). Morgagni hernias comprise approximately 2% of all CDH, are generally accompanied by a hernia sac, and often do not cause symptoms in the newborn period.</div></li><li class="half_rhythm"><div><b>Other anterior hernias associated with pentalogy of Cantrell.</b> These rare and severe types of hernia are found in individuals with pentalogy of Cantrell (which also includes defects in the supraumbilical midline abdominal wall, lower sternum, diaphragmatic pericardium, and heart).</div></li><li class="half_rhythm"><div><b>Central hernia.</b> This hernia is a rare diaphragm defect involving the central tendinous (i.e., amuscular) portion of the diaphragm. The entire rim of diaphragmatic musculature is present (see <a class="figpopup" href="/books/NBK1359/figure/cdh-ov.F2/?report=objectonly" target="object" rid-figpopup="figcdhovF2" rid-ob="figobcdhovF2">Figure 2C</a>).</div></li></ul><p><b>Diaphragmatic eventration</b> is incomplete muscularization of the diaphragm resulting in a thin membranous sheet of tissue. It is difficult to estimate the frequency of eventration because it may coexist with and/or be misdiagnosed as a Bochdalek hernia. Severe diaphragmatic eventration is associated with pulmonary hypoplasia and respiratory distress during infancy. Milder degrees of diaphragmatic eventration can present later in life with respiratory symptoms such as cough and pneumonias, or without symptoms, so that the diagnosis is made incidentally on chest radiograph. Increasingly, it is observed that eventration of the diaphragm and CDH can occur in the same individual and in different individuals with pathogenic variants in the same gene, suggesting that in some instances they share a common etiology.</p><p><b>Sac hernia.</b> All hernia types can present with a sac (e.g., membranous sheet of tissue) covering the herniated abdominal contents. Animal models suggest that abnormal connective tissue, resulting in a localized amuscular region, rather than a primary defect in myogenic cells, is the embryogenetic basis of the hernia sac [<a class="bk_pop" href="#cdh-ov.REF.merrell.2015.496">Merrell et al 2015</a>]. The presence of a sac is often reported to be associated with a better prognosis. However, because a thin and redundant membranous diaphragm resulting from an eventration defect may represent a "sac," it is probable that eventration and "sac type" CDH diagnoses are often interchanged. For this reason, it is inaccurate to assume that the prognosis is better when a sac is visualized.</p><p>CDH can occur as either an isolated or complex anomaly:</p><ul><li class="half_rhythm"><div><b>Isolated.</b> Observed in 50%-60% of probands; not associated with other major congenital anomalies</div></li><li class="half_rhythm"><div><b>Complex.</b> Observed in 40%-50% of probands and associated with other congenital anomalies:</div><ul><li class="half_rhythm"><div><b>Syndromic.</b> Some individuals with complex CDH have a readily identifiable genetic syndrome or chromosome anomaly (see <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia">Tables 1</a>, <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia_1/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia1">2</a>, and <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">3</a>). Individuals with syndromic CDH are more likely to be diagnosed prenatally, have an affected first-degree relative (10%), and have a worse prognosis. More than 50% of individuals with syndromic CDH are born preterm and have low birth weight [<a class="bk_pop" href="#cdh-ov.REF.shanmugam.2017.1451">Shanmugam et al 2017</a>].</div></li><li class="half_rhythm"><div><b>Complex CDH not attributed to a recognized syndrome.</b> The remaining probands with complex CDH present with associated additional malformations (e.g., craniofacial, ocular, cardiovascular, central nervous system, limb, genitourinary) but do not have a recognizable syndromic phenotype.</div></li></ul></li></ul></div><div id="cdh-ov.Establishing_the_Diagnosis_of_CDH"><h3>Establishing the Diagnosis of CDH</h3><p>Congenital diaphragmatic hernias are increasingly diagnosed prenatally; however, they are occasionally diagnosed in symptomatic neonates and even asymptomatic or mildly symptomatic children, teens, and adults.</p><div id="cdh-ov.Prenatal_Diagnosis"><h4>Prenatal Diagnosis</h4><p>Prenatal investigations by second-trimester two-dimensional (2D) ultrasound and/or MRI detect more than 60% of affected fetuses with right-sided defects and more than 80% of those with left-sided CDH [<a class="bk_pop" href="#cdh-ov.REF.beaumier.2015.731">Beaumier et al 2015</a>]. Ultrasound demonstrates herniated viscera with or without liver in the fetal thorax, absence of the normal position of the stomach bubble below the diaphragm, and mediastinal shift. MRI is especially useful for the prenatal diagnosis of thoracic lesions that are atypical or complicated by multiple abnormalities and for assessing lung volumes [<a class="bk_pop" href="#cdh-ov.REF.matsuoka.2003.447">Matsuoka et al 2003</a>]. Estimates of fetal lung volume and descriptions of the amount of herniated viscera are often used as prognostic indicators (see <a href="#cdh-ov.Prognosis">Prognosis</a>).</p><p><b>Color flow Doppler</b> can be used to:</p><ul><li class="half_rhythm"><div>Demonstrate abnormal positioning of the umbilical and portal veins, which are indicative of liver herniation;</div></li><li class="half_rhythm"><div>Identify right-sided hernias, which can be difficult to detect on ultrasound examination because of the similar echogenicity of lung and liver.</div></li></ul><p><b>Fetal MRI</b> is increasingly being used to confirm the diagnosis of CDH during the second and third trimester as a complementary tool to ultrasound studies to better define fetal anatomy [<a class="bk_pop" href="#cdh-ov.REF.kasprian.2006.261">Kasprian et al 2006</a>]. The primary advantage of fetal MRI is the ability to measure total lung volume and allow a quantitative assessment of the liver mass herniated into the chest. A systematic review and meta-analysis of observational studies suggests that fetal MRI can be used to predict neonatal survival with some caveats [<a class="bk_pop" href="#cdh-ov.REF.mayer.2011.1086">Mayer et al 2011</a>]:</p><ul><li class="half_rhythm"><div>MRI has limited benefit early in gestation.</div></li><li class="half_rhythm"><div>Lung measurements in individuals with CDH are not standardized.</div></li><li class="half_rhythm"><div>Survival rates and treatment protocols from different centers are not comparable.</div></li></ul></div><div id="cdh-ov.Postnatal_Diagnosis"><h4>Postnatal Diagnosis</h4><p>CDH can be detected in a neonate by:</p><ul><li class="half_rhythm"><div>Presence of a scaphoid abdomen, diminished breath sounds ipsilateral to the side of the hernia, and displacement of the heart sounds contralateral to the hernia.</div></li><li class="half_rhythm"><div>Chest radiograph shows visible bowel gas above the diaphragm accompanied by a mediastinal shift.</div></li></ul><p>Rarely, older children or adults with inconspicuous congenital diaphragmatic defects can be suspected because of respiratory or gastrointestinal symptoms including chronic cough, recurrent pulmonary infections, pleural effusions, pneumonia, or dysphagia. Intestinal obstruction and volvulus may be presenting symptoms, as abnormalities in the usual intestinal rotation during fetal development are common. Finally, some individuals may be diagnosed incidentally by plain chest radiographs or other imaging procedures. In these individuals, the degree of respiratory symptoms is correlated with the degree of pulmonary hypoplasia and can be limited.</p></div></div><div id="cdh-ov.Clinical_Manifestations"><h3>Clinical Manifestations</h3><div id="cdh-ov.Respiratory_Compromise"><h4>Respiratory Compromise</h4><p>Infants with CDH often present in the neonatal period with severe respiratory distress, occasionally after a stable period of 24-48 hours followed by acute respiratory distress. Breath sounds are diminished ipsilateral to the hernia. Almost all individuals with CDH have some degree of pulmonary hypoplasia. The pathogenesis of the pulmonary hypoplasia associated with CDH appears to have both a primary component (i.e., the hypoplasia occurs independent of the diaphragm defect) and a secondary component (i.e., arising from competition for thoracic space particularly in the lung ipsilateral to the hernia). Evidence for the presence of a primary defect in lung development arises mostly from studies in animal models, some of which show that the lung hypoplasia precedes the herniation of abdominal viscera.</p><p>Infants with CDH typically require mechanical ventilation and sometimes extracorporeal membrane oxygenation (ECMO) in the newborn period. Major respiratory complications include tracheobronchomalacia, pneumothorax, and secondary lung infection (especially viral pneumonia) that could precipitate terminal respiratory failure even months after surgery. Many infants require ongoing oxygen supplementation and diuretics following surgical correction of CDH. Given the remarkable growth and recuperative capacity of the lung, these treatments can usually be discontinued within the first two years of life.</p><p>By early childhood, few children have respiratory symptoms at rest; however, formal testing in older children shows small airway obstruction and diminished blood flow on ventilation-perfusion (V-Q) scan, especially to the lung ipsilateral to the hernia. Reduced exercise tolerance can be a lifelong problem. Intermittent wheezing requiring bronchodilator use is common in people with CDH, and they are at risk for respiratory decompensation with intercurrent illness.</p></div><div id="cdh-ov.Pulmonary_Hypertension"><h4>Pulmonary Hypertension</h4><p>Abnormal pulmonary vascular development and function is a significant problem in infants with CDH. Guidelines for the diagnosis of pediatric pulmonary hypertension were set forth by the American Heart Association and American Thoracic Society [<a class="bk_pop" href="#cdh-ov.REF.abman.2015.2037">Abman et al 2015</a>]; however, individuals with CDH present a unique challenge because of the very young age of onset in PH. The mechanism of pulmonary hypertension in CDH is not completely understood. The size of the pulmonary vascular bed is decreased in the hypoplastic lungs and the vasculature displays medial and adventitial thickening [reviewed in <a class="bk_pop" href="#cdh-ov.REF.harting.2017.147">Harting 2017</a>]. Notable is the premature differentiation of smooth muscle cells into a contractile phenotype [<a class="bk_pop" href="#cdh-ov.REF.sluiter.2013.195">Sluiter et al 2013</a>]. Failure of relaxation of the pulmonary vasculature at birth is a critical component leading to pulmonary hypertension in CDH and it is the consequence of abnormal expression of both vasoconstrictors and vasodilators in distinct but converging pathways [<a class="bk_pop" href="#cdh-ov.REF.mcculley.2018.655">McCulley et al 2018</a>].</p></div><div id="cdh-ov.Gastrointestinal"><h4>Gastrointestinal</h4><p>"Failure to thrive" with growth parameters lower than than the third centile of normal is common among infants with more significant pulmonary hypoplasia and/or a more prolonged hospitalization following surgical repair of CDH. Growth failure is caused, in large part, by oral aversion and feeding difficulties (often requiring gastrostomy tube insertion for the first few years of life) and gastroesophageal reflux (frequently requiring pharmacotherapy and/or surgical fundoplication). Some infants and children require long-term high-calorie nutritional supplements.</p></div><div id="cdh-ov.NeurologicDevelopmental"><h4>Neurologic/Developmental</h4><p>Reporting of neurodevelopmental outcomes is complicated by lack of standardization in terms of outcomes assessed, age of assessment, and metrics used (reviewed in <a class="bk_pop" href="#cdh-ov.REF.ijsselstijn.2018.181">IJsselstijn et al [2018]</a>). The main independent predictor of intellectual disability is ECMO treatment. Mild (44%) or severe (13%) delay in at least one domain at age one year has been reported. Later, intelligence is reported in the normal range for the majority of individuals with isolated CDH, but educational support in school is often warranted and behavioral issues such as struggling with concentration and attention are common [<a class="bk_pop" href="#cdh-ov.REF.friedman.2008.1035">Friedman et al 2008</a>, <a class="bk_pop" href="#cdh-ov.REF.peetsold.2009.834">Peetsold et al 2009</a>, <a class="bk_pop" href="#cdh-ov.REF.ijsselstijn.2018.181">IJsselstijn et al 2018</a>]. Preschool motor development scores in individuals with CDH are normal or mildly reduced, and improve with age; however, nonfocal neurologic abnormalities such as hypotonia are common, as are motor problems, especially in ECMO survivors [<a class="bk_pop" href="#cdh-ov.REF.nijhuisvan_der_sanden.2009.r47">Nijhuis-van der Sanden et al 2009</a>]. Nonspecific findings such as cortical atrophy, ventriculomegaly, and intracranial hemorrhage can be seen on neuroimaging studies [<a class="bk_pop" href="#cdh-ov.REF.ahmad.1999.436">Ahmad et al 1999</a>, <a class="bk_pop" href="#cdh-ov.REF.bouman.2000.3">Bouman et al 2000</a>, <a class="bk_pop" href="#cdh-ov.REF.rasheed.2001.539">Rasheed et al 2001</a>].</p></div><div id="cdh-ov.Musculoskeletal"><h4>Musculoskeletal</h4><p>Chest asymmetry is found in as many as half of individuals with CDH. Pectus deformity, most often of the excavatum type, and scoliosis (≥10° Cobb's angle) are found in approximately 25% of individuals. These musculoskeletal abnormalities occur more often following repair of large diaphragmatic defects, possibly as a result of the extra tension exerted on the chest wall during surgical repair.</p></div><div id="cdh-ov.Sensorineural_Hearing_Loss"><h4>Sensorineural Hearing Loss</h4><p>Sensorineural hearing loss (SNHL) has been found in 25% of individuals with CDH and as many as 100% of individuals treated with ECMO in some series [<a class="bk_pop" href="#cdh-ov.REF.rasheed.2001.539">Rasheed et al 2001</a>, <a class="bk_pop" href="#cdh-ov.REF.robertson.2002.353">Robertson et al 2002</a>]. The fact that SNHL is late-onset and progressive, and therefore is not present on neonatal hearing screening, makes it difficult to compare studies and provide a more precise frequency. One study of ECMO survivors showed that SNHL was 2.5 times more common among those requiring ECMO for CDH than for other indications; however, other studies report similar frequencies after ECMO independent of the underlying diagnosis [<a class="bk_pop" href="#cdh-ov.REF.van_den_hondel.2013.62">van den Hondel et al 2013</a>]. Other factors such as prolonged treatment with aminoglycosides, use of nitric oxide, prolonged or high-frequency mechanical ventilation, and/or metabolic alkalosis could also contribute to the development of SNHL [<a class="bk_pop" href="#cdh-ov.REF.fligor.2005.1519">Fligor et al 2005</a>].</p></div></div><div id="cdh-ov.Prognosis"><h3>Prognosis</h3><p><b>Mortality.</b> Mortality estimates range from 20% to 60% due to variation in patient populations and data collection techniques. Data from neonatal or referral centers, primarily including those with isolated left-sided Bochdalek hernia, report 80%-90% survival [<a class="bk_pop" href="#cdh-ov.REF.downard.2003.729">Downard et al 2003</a>]. However, population-based studies of outcome for all prenatally diagnosed individuals with CDH report mortality of at least 50%, if pregnancy terminations are included [<a class="bk_pop" href="#cdh-ov.REF.colvin.2005.e356">Colvin et al 2005</a>]. In a meta-analysis, <a class="bk_pop" href="#cdh-ov.REF.stege.2003.532">Stege et al [2003]</a> observed that approximately one quarter of all prenatally diagnosed fetuses were electively terminated, 3% spontaneously miscarried, and 3% were stillborn; 31% of the live-born infants died, the majority within the first 24 hours of life.</p><p>
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<b>Prognostic indicators</b>
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</p><ul><li class="half_rhythm"><div><b>Whether the CDH is isolated or complex.</b> Higher mortality occurs with complex CDH associated with a chromosome abnormality, a single-gene disorder, and/or the coexistence of major malformations. The presence of a cardiovascular malformation also indicates a worse prognosis [<a class="bk_pop" href="#cdh-ov.REF.cohen.2002.25">Cohen et al 2002</a>].</div></li><li class="half_rhythm"><div><b>The size of the diaphragm defect</b> [<a class="bk_pop" href="#cdh-ov.REF.lally.2007.e651">Lally et al 2007</a>]</div></li><li class="half_rhythm"><div><b>The degree of pulmonary hypoplasia.</b> Several methods are used to estimate the severity of pulmonary hypoplasia using imaging techniques. Prenatal estimates of lung-to-head ratio (LHR), observed/expected-total fetal lung volume (O/E-TFLV), and percent liver herniation (%LH) have been proposed as outcome predictors. The O/E-TFLV has the advantage of correcting for gestational age: LHR values increase as gestation progresses [<a class="bk_pop" href="#cdh-ov.REF.schaible.2012.1076">Schaible et al 2012</a>]. Using multivariate regression, MRI-based O/E-TFLV was shown to be an independent predictor of six-month mortality [<a class="bk_pop" href="#cdh-ov.REF.akinkuotu.2016.44">Akinkuotu et al 2016</a>].</div></li><li class="half_rhythm"><div><b>Liver herniation</b> was associated with poorer prognosis in a large systematic review and meta-analysis of cases with prenatal detection of CDH [<a class="bk_pop" href="#cdh-ov.REF.mullassery.2010.609">Mullassery et al 2010</a>].</div></li><li class="half_rhythm"><div><b>The severity of pulmonary hypertension in the perinatal period.</b> Pulmonary hypertension, which may progress to a late or chronic phase, is often not responsive to medical therapy [<a class="bk_pop" href="#cdh-ov.REF.kinsella.2005.123">Kinsella et al 2005</a>].</div></li><li class="half_rhythm"><div><b>Whether the hernia is right-sided, left-sided, or bilateral.</b> Some, but not all, studies show that a right-sided hernia is associated with greater mortality than a left-sided hernia [<a class="bk_pop" href="#cdh-ov.REF.skari.2000.1187">Skari et al 2000</a>]. Bilateral CDH always confers a high mortality. More recent studies suggest that fetuses with right-sided defects showed higher rates of adverse ultrasound predictors, but equivalent survival to left-sided defects [<a class="bk_pop" href="#cdh-ov.REF.sperling.2018.919">Sperling et al 2018</a>].</div></li></ul></div><div id="cdh-ov.Differential_Diagnosis"><h3>Differential Diagnosis</h3><p><b>Bronchogenic (foregut</b>
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<b>duplication</b><b>) cysts</b> result from abnormal budding of the ventral foregut [<a class="bk_pop" href="#cdh-ov.REF.knudtson.2004.179">Knudtson & Grewal 2004</a>]. They contain several components of the bronchi, including respiratory epithelia, mucous glands, and cartilage and may occur anywhere along the length of the trachea or esophagus. Most are diagnosed incidentally, although cysts can become infected or if large enough, can compress the esophagus and/or trachea.</p><p><b>Congenital cystic adenomatoid malformation (CCAM)</b> is a developmental abnormality of the lung resulting from abnormal cell proliferation and decreased programmed cell death of lung tissue. Abnormally formed bronchi connect to the CCAM. Type I CCAM is most common and is distinguished by relatively large cysts and mucin production. Symptoms can result when CCAMs grow in size and compress structures in the mediastinum.</p><p><b>Cystic teratomas</b> are benign tumors most often found in the anterior mediastinum [<a class="bk_pop" href="#cdh-ov.REF.jaggers.2004.201">Jaggers & Balsara 2004</a>]. They consist of several differentiated cell types derived from endoderm, ectoderm, and/or mesoderm. Cystic teratomas of the mediastinum are uncommon, comprising fewer than 10% of all tumors in that region.</p><p><b>Neurogenic tumors</b> are the most common lesion found in the posterior mediastinum. They are likely to be of neural crest origin; the majority are benign. Examples include: neurilemoma, neurofibroma, ganglioneuroma, pheochromocytoma, and neuroblastoma. CT and MRI are helpful in establishing the diagnosis.</p><p><b>Paraesophageal hernia</b> occurs when a portion of the stomach and sometimes part of the peritoneal sac containing the spleen or colon move into the chest cavity through the (normally occurring but) generally enlarged or dilated esophageal hiatus. More accurately, paraesophageal hernias are a type of hiatal hernia, in which the stomach gets "stuck" in the chest, rather than sliding back and forth between the thorax and abdomen. Approximately 5%-10% of (acquired) hernias are paraesophageal. They are rare in infancy and most commonly present in older adults.</p><p><b>Pulmonary agenesis</b> refers to partial or complete absence of lung tissue that is caused by failure of lung bud development. It is often associated with additional congenital malformations.</p><p><b>Pulmonary sequestration</b> results from primitive lung tissue that is not connected to the tracheobronchial tree. Sequestration may be intrapulmonary, occurring within the pleura of the normal lung, or extrapulmonary, occurring outside the normal lung within its own pleural sac. Extrapulmonary sequestration appears to arise from an accessory lung bud and often has associated anomalies, such as CDH. The most common presenting symptom is recurrent chest infections.</p></div></div><div id="cdh-ov.Genetic_Causes_of_Congenital_Diap"><h2 id="_cdh-ov_Genetic_Causes_of_Congenital_Diap_">2. Genetic Causes of Congenital Diaphragmatic Hernia</h2><p>Older data using standard cytogenetic and molecular cytogenetic techniques showed that approximately 15%-20% of individuals with CDH were identified as having a genetic cause for their diaphragm defect [<a class="bk_pop" href="#cdh-ov.REF.pober.2005.81">Pober et al 2005</a>, <a class="bk_pop" href="#cdh-ov.REF.pober.2008.1">Pober 2008</a>]. These frequencies are likely an underestimate and are evolving with the availability of next-generation sequencing and the identification of new CDH-associated genes. Genetic causes can be subdivided into <b>monogenic causes</b> (<a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia">Table 1</a>) and <b>chromosome anomalies</b> (<a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">Table 3</a>). Though monogenic CDH can be isolated, it is more commonly syndromic.</p><div id="cdh-ov.T.congenital_diaphragmatic_hernia" class="table"><h3><span class="label">Table 1. </span></h3><div class="caption"><p>Congenital Diaphragmatic Hernia: Monogenic Causes and Distinguishing Clinical Features</p></div><p class="large-table-link" style="display:none"><span class="right"><a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia/?report=objectonly" target="object">View in own window</a></span></p><div class="large_tbl" id="__cdh-ov.T.congenital_diaphragmatic_hernia_lrgtbl__"><table class="no_bottom_margin"><thead><tr><th id="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Gene(s) <sup>1</sup></th><th id="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Syndrome</th><th id="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">MOI</th><th id="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Occurrence of CDH in Persons w/the Syndrome</th><th id="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Distinguishing Clinical Features</th></tr></thead><tbody><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>LRP2</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<a href="/books/n/gene/donnai/">Donnai-Barrow syndrome</a>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AR</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Enlarged anterior fontanelle, agenesis of the corpus callosum, hypertelorism, retinal anomalies, omphalocele or umbilical hernia</div></li><li class="half_rhythm"><div>Sensorineural hearing loss, myopia, ID</div></li><li class="half_rhythm"><div>Characteristic pattern of low-molecular-weight proteinuria</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>LTBP4</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<a href="/books/n/gene/ltbp4-cutis-laxa/"><i>LTBP4</i>-related cutis laxa</a>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AR</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Loose redundant skin, pulmonary emphysema, GI & bladder diverticula</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>MYRF</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<a href="/books/n/gene/myrf-cugs/"><i>MYRF</i>-related cardiac urogenital syndrome</a>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Congenital heart defects, GU defects</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>RARB</i>
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<br />
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<i>STRA6</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Microphthalmia, syndromic (OMIM <a href="https://omim.org/entry/615524" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">615524</a>; <a href="https://omim.org/entry/601186" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">601186</a>)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AR</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Micro-/anophthalmia, pulmonary agenesis or hypoplasia, cardiac malformations, GU anomalies</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>RLIM</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Tonne-Kalscheuer syndrome (OMIM <a href="https://omim.org/entry/300978" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">300978</a>)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">XL</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>ID, behavioral difficulties</div></li><li class="half_rhythm"><div>GU malformations, distal digital hypoplasia</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>COX7B</i>
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<br />
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<i>HCCS</i>
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<br />
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<i>NDUFB11</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<a href="/books/n/gene/microph-lsd/">Microphthalmia with linear skin defects syndrome</a>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">XL</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Microphthalmia, sclerocornea, linear dermal hypoplasia, brain, cardiac, & GU anomalies, nail dystrophy</div></li><li class="half_rhythm"><div>Hearing impairment</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>NR2F2</i>
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|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Congenital heart defects, multiple types, 4 (OMIM <a href="https://omim.org/entry/615779" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">615779</a>)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Congenital heart defects</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>PIGN</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><i>PIGN</i>-related <a href="/books/n/gene/fryns/">Fryns syndrome</a> <sup>3</sup></td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AR</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Characteristic facial appearance; short distal phalanges of fingers & toes; pulmonary hypoplasia; & assoc anomalies (polyhydramnios, cloudy corneas &/or microphthalmia, orofacial clefting, renal dysplasia / renal cortical cysts, &/or malformations involving brain, cardiovascular system, GI system, &/or genitalia)</div></li><li class="half_rhythm"><div>Survival beyond neonatal period is rare.</div></li></ul>
|
|
</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>SLC2A10</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<a href="/books/n/gene/arterial-t/">Arterial tortuosity syndrome</a>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AR</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Arterial tortuosity, stenosis, & aneurysms, joint laxity, hyperextensible skin</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>ZFPM2</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Diaphragmatic hernia type 3 (OMIM <a href="https://omim.org/entry/610187" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">610187</a>)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Congenital heart defects, gonadal dysgenesis, ambiguous genitalia</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>ARID1A</i>
|
|
<br />
|
|
<i>ARID1B</i>
|
|
<br />
|
|
<i>SMARCA4</i>
|
|
<br />
|
|
<i>SMARCB1</i>
|
|
<br />
|
|
<i>SMARCE1</i>
|
|
<br />
|
|
<i>SOX11</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<a href="/books/n/gene/coffin-siris/">Coffin-Siris syndrome</a>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Hypoplasia/absence of nail/phalanx of 5th digit (& occasionally of additional digits), scalp hypotrichosis, body hypertrichosis, facial dysmorphology (coarse face, wide mouth, full lips), brain & cardiac anomalies</div></li><li class="half_rhythm"><div>Growth restriction</div></li><li class="half_rhythm"><div>ID</div></li></ul>
|
|
</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Imprinting<br />defect at<br />11p15.5<br /><i>CDKN1C</i></td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<a href="/books/n/gene/bws/">Beckwith-Wiedemann syndrome</a>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">See footnote 2.</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Prenatal &/or postnatal overgrowth, macroglossia, visceromegaly, hemihypertrophy</div></li><li class="half_rhythm"><div>Abdominal wall defects, earlobe creases or pits behind the upper ear</div></li><li class="half_rhythm"><div>Embryonal tumors</div></li></ul>
|
|
</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>CHD7</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">CHARGE syndrome (See <a href="/books/n/gene/charge/"><i>CHD7</i> Disorder</a>.)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Coloboma, ear anomalies, cranial nerve deficits, choanal atresia or stenosis, oral facial clefts, cardiac malformations, GU anomalies, tracheoesophageal atresia</div></li><li class="half_rhythm"><div>Growth deficiency</div></li></ul>
|
|
</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>COL3A1</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<a href="/books/n/gene/eds4/">Vascular Ehlers-Danlos syndrome</a>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Arterial & visceral fragility & rupture</div></li><li class="half_rhythm"><div>Thin translucent skin, micrognathia, narrow nose, thin vermillion of lip, prominent eyes, acrogeria, joint hypermobility</div></li></ul>
|
|
</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>DLL3</i>
|
|
<br />
|
|
<i>HES7</i>
|
|
<br />
|
|
<i>LFNG</i>
|
|
<br />
|
|
<i>MESP2</i>
|
|
<br />
|
|
<i>RIPPLY2</i>
|
|
<br />
|
|
<i>TBX6</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<a href="/books/n/gene/spondylocostal-d/">Spondylocostal dysostosis</a>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AR</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Hemivertebrae, vertebral fusion, scoliosis, rib anomalies, short stature, cleft palate, digital anomalies, & renal anomalies</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>EFNB1</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Craniofrontonasal syndrome (OMIM <a href="https://omim.org/entry/304110" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">304110</a>)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">XL</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Hypertelorism, broad or bifid nose, midface hypoplasia, craniosynostosis, digital anomalies</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>FBN1</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<a href="/books/n/gene/marfan/">Marfan syndrome</a>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Connective tissue dysplasia characterized by tall stature, long limbs, subluxation of the lens, dilatation of the ascending aorta</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>FGFR2</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Apert syndrome (See <a href="/books/n/gene/craniosynostosis/"><i>FGFR</i> Craniosynostosis Syndromes Overview</a>.)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Craniosynostosis, mid-face hypoplasia, hypertelorism, fusion of cervical vertebrae, soft tissue & bony syndactyly of hands & feet</div></li><li class="half_rhythm"><div>ID</div></li></ul>
|
|
</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>FRAS1</i>
|
|
<br />
|
|
<i>FREM2</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Fraser syndrome (OMIM <a href="https://omim.org/entry/219000" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">219000</a>)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AR</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Cryptophthalmos; syndactyly; GU, ear, and laryngeal malformations</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>GATA4</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Congenital diaphragmatic hernia & heart defects [<a class="bk_pop" href="#cdh-ov.REF.yu.2013.285">Yu et al 2013</a>]</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Congenital heart defects</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>GATA6</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Heart defects, congenital & other congenital anomalies (OMIM <a href="https://omim.org/entry/600001" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">600001</a>)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Congenital heart defects, pancreatic agenesis, gallbladder agenesis</div></li><li class="half_rhythm"><div>DD</div></li></ul>
|
|
</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>GPC3</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<a href="/books/n/gene/sgbs/">Simpson-Golabi-Behmel syndrome type 1</a>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">XL</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Macrosomia, macrocephaly, hypertelorism, umbilical hernia, omphalocele, ocular & renal anomalies</div></li><li class="half_rhythm"><div>Embryonal tumors</div></li><li class="half_rhythm"><div>ID</div></li></ul>
|
|
</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>KMT2D</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="2" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<a href="/books/n/gene/kabuki/">Kabuki syndrome</a>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="2" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="2" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Long palpebral fissures, eversion of lower eyelids, arched/discontinuous eyebrows w/lateral thinning, prominent ears, oral clefts, fetal finger pads, short 5th finger, cardiovascular malformations</div></li><li class="half_rhythm"><div>Postnatal growth deficiency</div></li><li class="half_rhythm"><div>Mild-to-moderate ID</div></li></ul>
|
|
</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>KDM6A</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" colspan="1" rowspan="1" style="text-align:left;vertical-align:middle;">XL</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<i>NIPBL</i>
|
|
<br />
|
|
<i>RAD21</i>
|
|
<br />
|
|
<i>SMC3</i>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="2" colspan="1" style="text-align:left;vertical-align:middle;">
|
|
<a href="/books/n/gene/cdls/">Cornelia de Lange syndrome</a>
|
|
</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="2" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="2" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Microcephaly, synophrys, arched eyebrows, long eyelashes, small upturned nose, growth deficiency, hirsutism, upper limb anomalies</div></li><li class="half_rhythm"><div>ID</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>HDAC8</i>
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<br />
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<i>SMC1A</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" colspan="1" rowspan="1" style="text-align:left;vertical-align:middle;">XL</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>POGZ</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<a href="/books/n/gene/white-sutton/">White-Sutton syndrome</a>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>DD, autism, ID</div></li><li class="half_rhythm"><div>Hypotonia, facial dysmorphism, visual impairment</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>PORCN</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<a href="/books/n/gene/focal-dh/">Focal dermal hypoplasia</a>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">XL</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Asymmetry of the face, trunk, & extremities; skin atrophy w/fat herniation, hyper- & hypopigmentation, mucous & perioral papillomas, digit anomalies, dental anomalies, coloboma, microphthalmia; osteopathia striata</div></li><li class="half_rhythm"><div>Mild ID</div></li><li class="half_rhythm"><div>High frequency of male lethality</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1" rowspan="2" scope="row" colspan="1" style="text-align:left;vertical-align:middle;">
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<i>WT1</i>
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</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Denys-Drash syndrome (See <a href="/books/n/gene/wt1-dis/"><i>WT1</i> Disorder</a>.)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_3" rowspan="2" colspan="1" style="text-align:left;vertical-align:middle;">AD</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_4" rowspan="2" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>GU anomalies, typically undermasculinized 46,XY individuals, diffuse mesangial sclerosis</div></li><li class="half_rhythm"><div>Wilms tumor</div></li><li class="half_rhythm"><div>Early-onset kidney failure</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_2" colspan="1" scope="row" rowspan="1" style="text-align:left;vertical-align:middle;">Meacham syndrome (See <a href="/books/n/gene/wt1-dis/"><i>WT1</i> Disorder</a>.)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_5" colspan="1" rowspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>46,XY males, undervirilization of external male genitalia, ambiguous or female external genitalia, retained müllerian structures w/double vagina</div></li><li class="half_rhythm"><div>Pulmonary hypoplasia, complex cardiac malformations</div></li></ul>
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</td></tr></tbody></table></div><div><div><dl class="temp-labeled-list small"><dt></dt><dd><div><p class="no_margin">AD = autosomal dominant; AR = autosomal recessive; GI = gastrointestinal; GU = genitourinary; MOI = mode of inheritance; XL = X-linked; DD = developmental delay; ID = intellectual disability</p></div></dd><dt></dt><dd><div><p class="no_margin">+++ = CDH is considered a core feature in this syndrome. For extensively reported syndromes, CDH is a common finding (i.e., >40%).</p></div></dd><dt></dt><dd><div><p class="no_margin">++ = CDH is a variable feature of this syndrome. For extensively reported syndromes, CDH is a less common finding (i.e., ~10%-40%). For less extensively characterized syndromes, multiple case reports of CDH are present in the published literature.</p></div></dd><dt></dt><dd><div><p class="no_margin">+ = CDH is a rare feature of this syndrome. For extensively reported syndromes (e.g., trisomy 21), many case reports of CDH are present in the literature, though the overall incidence of CDH in this syndrome is estimated at <10%. For less extensively characterized syndromes, few case reports are present in the literature; however, it is not generally considered to be a component of the syndrome.</p></div></dd><dt>1. </dt><dd><div id="cdh-ov.TF.1.1"><p class="no_margin">Genes are listed alphabetically</p></div></dd><dt>2. </dt><dd><div id="cdh-ov.TF.1.2"><p class="no_margin">The majority of Beckwith-Wiedemann syndrome (BWS) is caused by imprinting defects or uniparental disomy of 11p15.5 and is simplex (i.e., a single occurrence in a family). In a small number of affected individuals, BWS is caused by a maternally inherited pathogenic variant in <i>CDKN1C</i>.</p></div></dd><dt>3. </dt><dd><div id="cdh-ov.TF.1.3"><p class="no_margin">Genetic heterogeneity for Fryns syndrome remains highly probable, as some individuals clinically diagnosed with Fryns syndrome have not had <i>PIGN</i> pathogenic variants identified. However, the number of individuals meeting the clinical diagnostic criteria for Fryns syndrome with negative testing for <i>PIGN</i> variants is unknown (see <a href="/books/n/gene/fryns/">Fryns Syndrome</a>).</p></div></dd></dl></div></div></div><div id="cdh-ov.T.congenital_diaphragmatic_hernia_1" class="table"><h3><span class="label">Table 2. </span></h3><div class="caption"><p>Congenital Diaphragmatic Hernia: Syndromic Causes of Unknown Genetic Etiology and Distinguishing Clinical Features</p></div><p class="large-table-link" style="display:none"><span class="right"><a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia_1/?report=objectonly" target="object">View in own window</a></span></p><div class="large_tbl" id="__cdh-ov.T.congenital_diaphragmatic_hernia_1_lrgtbl__"><table class="no_bottom_margin"><thead><tr><th id="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_1" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Syndrome</th><th id="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_2" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Predicted MOI <sup>1</sup></th><th id="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_3" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Occurrence of CDH in Persons w/Syndrome</th><th id="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_4" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Distinguishing Clinical Features</th></tr></thead><tbody><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><a href="/books/n/gene/fryns/">Fryns syndrome</a> of unknown genetic cause</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">AR</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Characteristic facial appearance; short distal phalanges of fingers & toes; pulmonary hypoplasia; & assoc anomalies (polyhydramnios, cloudy corneas &/or microphthalmia, orofacial clefting, renal dysplasia / renal cortical cysts, &/or malformations involving brain, cardiovascular system, GI system, &/or genitalia)</div></li><li class="half_rhythm"><div>Mild ID to severe DD in survivors</div></li><li class="half_rhythm"><div>Survival beyond neonatal period is rare.</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Pentalogy of Cantrell</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Unknown</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Sternal, pericardial, & abdominal wall defects w/cardiac defects & omphalocele</td></tr><tr><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Thoracoabdominal syndrome (OMIM <a href="https://omim.org/entry/313850" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">313850</a>)</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">XL</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.congenital_diaphragmatic_hernia_1_1_1_1_4" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Cardiac anomalies, hypoplastic lungs, abdominal wall defects, defect of lower sternum</td></tr></tbody></table></div><div><div><dl class="temp-labeled-list small"><dt></dt><dd><div><p class="no_margin">AR = autosomal recessive; ID = intellectual disability; MOI = mode of inheritance; XL = X-linked</p></div></dd><dt></dt><dd><div><p class="no_margin">+++ = CDH is considered a core feature in this syndrome. For extensively reported syndromes, CDH is a common component (i.e., >40%).</p></div></dd><dt></dt><dd><div><p class="no_margin">++ = CDH is a variable feature of this syndrome. For extensively reported syndromes, CDH is a less common finding (i.e., ~10%-40%). For less extensively characterized syndromes, multiple case reports of CDH are present in the published literature.</p></div></dd><dt>1. </dt><dd><div id="cdh-ov.TF.2.1"><p class="no_margin">Genetic basis is unknown and inheritance pattern is predicted based on reports of sib recurrences, parental consanguinity, parental transmission, or increased severity in males.</p></div></dd></dl></div></div></div><div id="cdh-ov.Chromosomal_Causes_of_Congenital"><h3>Chromosomal Causes of Congenital Diaphragmatic Hernia</h3><p>Historically, cytogenetically detectable chromosome anomalies have been reported in approximately 10% of individuals with CDH (see <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">Table 3</a>). More recently with the advent of higher-resolution molecular cytogenetic technologies, additional copy number variations have been described in individuals with CDH.</p><div id="cdh-ov.T.chromosome_anomalies_associated" class="table"><h3><span class="label">Table 3. </span></h3><div class="caption"><p>Chromosome Anomalies Associated with Congenital Diaphragmatic Hernia</p></div><p class="large-table-link" style="display:none"><span class="right"><a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object">View in own window</a></span></p><div class="large_tbl" id="__cdh-ov.T.chromosome_anomalies_associated_lrgtbl__"><table class="no_bottom_margin"><thead><tr><th id="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Chromosome Anomaly / Locus</th><th id="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Occurrence of CDH in Persons w/Chromosome Anomaly</th><th id="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" scope="col" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Distinguishing Clinical Features</th></tr></thead><tbody><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Pallister-Killian syndrome <sup>1</sup> (mosaic tetrasomy 12p; OMIM <a href="https://omim.org/entry/601803" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">601803</a>)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Prenatal: short limbs, CNS anomalies, ventricular dilatation, nuchal edema &/or hydrops fetalis</div></li><li class="half_rhythm"><div>Postnatal: bitemporal sparse hair, brachycephaly, high broad forehead, hypertelorism, low-set ears, broad nasal bridge, anteverted nostrils, long philtrum, progressively coarse features, short neck, nuchal skin redundancy, short broad hands, linear streaky hyperpigmentation, normal growth, seizures, ID, congenital heart defects (VSD)</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Del 1q41-q42 (OMIM <a href="https://omim.org/entry/612530" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">612530</a>)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Limb anomalies, CLP</div></li><li class="half_rhythm"><div>Seizures</div></li><li class="half_rhythm"><div>ID</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Wolf-Hirschhorn syndrome (del 4p16.3) (OMIM <a href="https://omim.org/entry/194190" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">194190</a>)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Typical craniofacial features</div></li><li class="half_rhythm"><div>Seizures</div></li><li class="half_rhythm"><div>Growth deficiency</div></li><li class="half_rhythm"><div>DD/ID</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Del 8p23.1 (OMIM <a href="https://omim.org/entry/222400" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">222400</a>)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Cardiovascular malformations, mild facial dysmorphology, renal anomalies</div></li><li class="half_rhythm"><div>ID</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Del 15q24 (OMIM <a href="https://omim.org/entry/613406" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">613406</a>)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Typical craniofacial features, malformations of hands & feet</div></li><li class="half_rhythm"><div>Growth deficiency</div></li><li class="half_rhythm"><div>ID w/marked speech delay</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Del 15q26.2 (OMIM <a href="https://omim.org/entry/142340" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">142340</a>)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Craniofacial anomalies, cardiovascular malformations, hypoplastic genitalia or cryptorchidism</div></li><li class="half_rhythm"><div>Growth deficiency</div></li><li class="half_rhythm"><div>ID</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Del 17q12</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">++</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Malformations of the genitourinary tract (e.g., echogenic kidneys)</div></li><li class="half_rhythm"><div>MODY</div></li><li class="half_rhythm"><div>ID</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Del 8q23.1 (OMIM <a href="https://omim.org/entry/610187" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">610187</a>)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Cardiovascular malformations, mild facial dysmorphology</div></li><li class="half_rhythm"><div>ID</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">
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<a href="/books/n/gene/gr_22q11deletion/">Del 22q11</a>
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</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Cardiovascular malformations, craniofacial dysmorphology, congenital anomalies</div></li><li class="half_rhythm"><div>Learning difficulties</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+der (22) t(11;22)(q23;q11)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Cardiovascular malformations, craniofacial anomalies (preauricular tags or sinuses, micrognathia, cleft palate)</div></li><li class="half_rhythm"><div>Growth deficiency</div></li><li class="half_rhythm"><div>ID</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Trisomy 13</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>IUGR, holoprosencephaly, scalp defects, CLP, cardiac defects, polydactyly</div></li><li class="half_rhythm"><div>High mortality</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Trisomy 18</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>IUGR, cardiovascular malformations, craniofacial dysmorphology, clenched hands</div></li><li class="half_rhythm"><div>High mortality</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Trisomy 21 (OMIM <a href="https://omim.org/entry/190685" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">190685</a>)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+<br />(Morgagni hernias > Bochdalek hernias)</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Characteristic facies, atrioventricular septal defects, gastrointestinal anomalies</div></li><li class="half_rhythm"><div>Hypotonia</div></li><li class="half_rhythm"><div>ID</div></li></ul>
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</td></tr><tr><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_1" scope="row" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">Trisomy 22</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_2" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;">+</td><td headers="hd_h_cdh-ov.T.chromosome_anomalies_associated_1_1_1_3" rowspan="1" colspan="1" style="text-align:left;vertical-align:middle;"><ul><li class="half_rhythm"><div>Hemihypertrophy, congenital heart disease</div></li><li class="half_rhythm"><div>Growth deficiency</div></li><li class="half_rhythm"><div>ID</div></li></ul>
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</td></tr></tbody></table></div><div><div><dl class="temp-labeled-list small"><dt></dt><dd><div><p class="no_margin">CLP = cleft lip and palate; DD = developmental delay; ID = intellectual disability; IUGR = intrauterine growth restriction; MODY = maturity-onset diabetes of the young; VSD = ventricular septal defect</p></div></dd><dt></dt><dd><div><p class="no_margin">++ CDH is a variable feature of this syndrome. For extensively reported syndromes, CDH is a less common finding (i.e., ~10%-40%). For less extensively characterized syndromes, multiple case reports of CDH are present in the published literature.</p></div></dd><dt></dt><dd><div><p class="no_margin">+ CDH is a rare feature of this syndrome. For extensively reported syndromes (e.g., trisomy 21), many case reports of CDH are present in the literature, though the overall incidence of CDH in this syndrome is estimated at <10%. For less extensively characterized syndromes, few case reports are present in the literature; however, it is not generally considered to be a component of the syndrome.</p></div></dd><dt>1. </dt><dd><div id="cdh-ov.TF.3.1"><p class="no_margin">Mosaicism for tetrasomy 12 can be identified in amniocytes, chorionic villi, and skin fibroblasts.</p></div></dd></dl></div></div></div></div></div><div id="cdh-ov.Evaluation_Strategies_to_Identify"><h2 id="_cdh-ov_Evaluation_Strategies_to_Identify_">3. Evaluation Strategies to Identify the Genetic Cause of Congenital Diaphragmatic Hernia in a Proband</h2><p>Establishing a specific genetic cause of congenital diaphragmatic hernia:</p><ul><li class="half_rhythm"><div>Can aid in discussions of prognosis (which are beyond the scope of this <i>GeneReview</i>) and <a href="#cdh-ov.Management">genetic counseling</a>;</div></li><li class="half_rhythm"><div>Usually involves a medical history, physical examination, family history, imaging, and genomic/genetic testing;</div></li><li class="half_rhythm"><div>Is complicated by the extreme genetic heterogeneity of the condition, which requires a tiered approach to genetic testing.</div></li></ul><div id="cdh-ov.Prenatal_Evaluation_Strategy"><h3>Prenatal Evaluation Strategy</h3><p><b>Medical history.</b> CDH is commonly diagnosed prenatally by detecting the abnormal positioning of the stomach, liver, or other viscera in the fetal thorax. Polyhydramnios is frequently present. Additional congenital anomalies identified on the fetal ultrasound may direct the diagnosis to a specific cause of congenital diaphragmatic hernia. Posterolateral (Bochdalek) hernias most commonly present within hours after birth with signs of pulmonary distress. <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia">Tables 1</a>, <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia_1/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia1">2</a>, and <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">3</a> provide a list of disorders frequently associated with CDH. Specific diagnostic investigations may be warranted when one of these conditions is suspected.</p><p><b>Physical examination.</b> In addition to viable pregnancies, possible outcomes of pregnancies with CDH include miscarriage, fetal death, and termination of pregnancy. If the cause of the diaphragmatic defect is unknown, a fetopsy or autopsy examination that includes photographs and skeletal radiographs may identify co-occurring anomalies. At the time of autopsy, a sample for genomic/genetic testing may be obtained.</p><p><b>Family history.</b> A three-generation family history should be taken, with attention to relatives with manifestations of congenital diaphragmatic hernia and/or infants who died in the perinatal period. Documentation of relevant findings in relatives should be obtained through direct examination or review of medical records, including results of molecular genetic testing.</p><div id="cdh-ov.Testing"><h4>Testing</h4><p><b>Cytogenetic testing.</b> Chorionic villus sampling (CVS) or amniocentesis for chromosome analysis (G-banded or Q-banded karyotype) are offered in many institutions as a first-line test in all fetuses prenatally diagnosed with CDH. Special attention must be paid in certain circumstances when mosaicism is suspected. Congenital diaphragmatic hernia, congenital heart defects, and rhizomelic limb shortening identified on ultrasound raise the suspicion for Pallister-Killian syndrome (PKS; see <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">Table 3</a>); however, the most frequent ultrasound finding in this condition is the combination of polyhydramnios, macrosomia, and limb shortening [<a class="bk_pop" href="#cdh-ov.REF.salzano.2018.2575">Salzano et al 2018</a>]. The isochromosome 12p characteristic of PKS may be missed in 50% of CVS samples, while the detection rate of amniocentesis is close to 90% [<a class="bk_pop" href="#cdh-ov.REF.salzano.2018.2575">Salzano et al 2018</a>].</p><p><b>Chromosomal microarray analysis (CMA</b>) using oligonucleotide or SNP arrays to detect microdeletions and microduplications is indicated in a fetus with CDH and additional multiple anomalies and/or a suggestive family history, if the karyotype has not identified a diagnosis (see <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">Table 3</a>). Molecular cytogenetic testing may also be offered even in individuals with apparently isolated CDH, since complex or syndromic presentations can be difficult to appreciate on prenatal imaging.</p><p><b>Exome sequencing.</b> To date, exome sequencing in the prenatal period is performed exclusively on a research basis in fetuses with abnormal ultrasound scans and normal microarray analysis of chorionic villi or amniocytes [<a class="bk_pop" href="#cdh-ov.REF.drury.2015.1010">Drury et al 2015</a>]. Family trio exome sequencing is preferred in this situation, because of the reported high rate of <i>de novo</i> sequence variants in both isolated and complex CDH [<a class="bk_pop" href="#cdh-ov.REF.longoni.2017.679">Longoni et al 2017</a>, <a class="bk_pop" href="#cdh-ov.REF.qi.2018.e1007822">Qi et al 2018</a>].</p><p>For an introduction to exome sequencing click <a href="/books/n/gene/app5/#app5.Comprehensive_Genomic_Testing">here</a>. More detailed information for clinicians ordering genomic testing can be found <a href="/books/n/gene/app5/#app5.Comprehensive_Genomic_Testing_1">here</a>.</p><p><b>Targeted prenatal testing</b> may be available in those situations in which the causative variant is known in an affected family member.</p></div></div><div id="cdh-ov.Postnatal_Evaluation_Strategy"><h3>Postnatal Evaluation Strategy</h3><p>Genetic testing should be directed by the clinical evidence garnered by the interpretation of medical history, physical examination, and family history.</p><p><b>Medical history.</b> Respiratory distress is the most prominent finding in a newborn with CDH. The degree of pulmonary hypoplasia and pulmonary hypertension is not directly correlated with the genetic etiology of the condition; however, individuals with syndromic CDH and multiple anomalies usually have worse outcomes. Prenatal exposure to pharmacologic agents and environmental hazards (e.g., phenmetrazine, thalidomide, quinine, cadmium, lead, nitrofen) must be investigated and excluded [<a class="bk_pop" href="#cdh-ov.REF.stolar.2012">Stolar & Dillon 2012</a>]. Newborns with CDH have an increased incidence of additional malformations that could assist in the differential diagnosis (see <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia">Tables 1</a>, <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia_1/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia1">2</a>, and <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">3</a>).</p><p><b>Physical examination.</b> Infants with CDH should be evaluated by a clinical geneticist for other structural birth defects (e.g., craniofacial, ocular, cardiovascular, central nervous system, limb, genitourinary), as well as minor anomalies or dysmorphic features, that may suggest a specific genetic cause of CDH (see <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia">Tables 1</a>, <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia_1/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia1">2</a>, and <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">3</a>). In the absence of a specific diagnosis, permission should be sought to perform an autopsy on deceased infants with CDH, especially in the perinatal period. The autopsy should include photographs, skeletal radiographs, and a sample for molecular genetic testing. A skin biopsy for cell line development and banking in a repository could provide additional genetic material should new tests be developed in the future; however, this option may only be available within a research study.</p><p><b>Family history.</b> A three-generation family history should be taken, with attention to relatives with manifestations of congenital diaphragmatic hernia and/or infants who died in the perinatal period and documentation of relevant findings through direct examination or review of medical records, including results of molecular genetic testing.</p><div id="cdh-ov.Testing_1"><h4>Testing</h4><p><b>Molecular genetic testing</b> approaches can also include a combination of comprehensive genomic testing (chromosomal microarray analysis, exome sequencing, genome sequencing), karyotype, and gene-targeted testing (single-gene testing, multigene panel).</p><p>Note: (1) In an otherwise healthy individual with isolated CHD and a negative family history, currently available clinical genetic testing has a relatively low yield. However, the decision to proceed with testing should be made by an experienced geneticist on a case-by-case basis and should be regularly reevaluated in light of the individual’s developmental course, as well as advances in identifying genetic contributions to CDH. (2) Special attention must be paid when considering the diagnosis of isochromosome 12p (Pallister-Killian syndrome; see <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">Table 3</a>) since peripheral blood chromosome studies are almost invariably normal in the postnatal period. A recent report, however, demonstrates presence of iso 12p mosaicism detected by CMA performed on DNA extracted from peripheral blood [<a class="bk_pop" href="#cdh-ov.REF.theisen.2009.914">Theisen et al 2009</a>].</p><p><b>Chromosomal microarray analysis (CMA</b>) using oligonucleotide or SNP arrays to detect microdeletions and microduplications should be considered as first-line testing in a child who has CDH with additional multiple anomalies and/or a suggestive family history (see <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">Table 3</a>). CMA is particularly useful in individuals with multiple anomalies whose constellation is not suggestive of a specific disorder.</p><p><b>Standard cytogenetic testing</b> has specialized utility in the postnatal period. If an aneuploidy (e.g., trisomy 21) or a chromosome rearrangement is suspected postnatally in an infant with CDH, a karyotype may be considered prior to performing CMA; see <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">Table 3</a> and <a href="#cdh-ov.Testing_1">Note: (2)</a> above.</p><p><b>Serial single-gene testing</b> can be considered if clinical findings and/or family history indicate that pathogenic variants in a particular gene are most likely (see <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia">Table 1</a>). Because it is laborious and frequently inconclusive, serial single-gene testing is not frequently employed and comprehensive genomic testing is preferred in its stead in the absence of a strong clinical suspicion.</p><p><b>A multigene panel</b> that includes some or all of the genes listed in the <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia">Table 1</a> is most likely to identify the genetic cause of the condition while limiting identification of variants of uncertain significance and pathogenic variants in genes that do not explain the underlying phenotype. No laboratories listed in the <a href="https://www.ncbi.nlm.nih.gov/gtr/" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">NCBI Genetic Testing Registry</a> (GTR) (last accession: February 1, 2019) offer multigene panels specifically designed around diaphragmatic defects, although some CDH-associated genes are frequently included in congenital heart defect panels. However, these multigene panels are of limited utility for individuals with nonsyndromic CDH and narrow utility for those with syndromic CDH. Clinical exome sequencing should be considered if comprehensive testing is clinically indicated.</p><p><b>Comprehensive</b>
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<b>genomic testing</b> (which does not require the clinician to a priori hypothesize which gene[s] are likely involved) may be considered in individuals with negative prior testing, or as first-line testing in individuals for whom a hypothesis for a single-gene disorder cannot be made readily. <b>Exome sequencing</b> is most commonly used; <b>genome sequencing</b> is also possible.</p><p><b>Exome sequencing.</b> Clinical exome sequencing in the postnatal period is recommended as second- or third-line testing due to considerations of cost and reimbursement (exome sequencing may also be offered as part of certain research studies if clinically unavailable). Its utility is presently confined to those with multiple anomalies and negative CMA and karyotype results. When exome sequencing is performed, concurrent or sequential trio testing is preferred to proband-only testing because of the reported high rate of <i>de novo</i> sequence variants in both isolated and complex CDH.</p><p>For an introduction to comprehensive genomic testing click <a href="/books/n/gene/app5/#app5.Comprehensive_Genomic_Testing">here</a>. More detailed information for clinicians ordering genomic testing can be found <a href="/books/n/gene/app5/#app5.Comprehensive_Genomic_Testing_1">here</a>.</p></div></div></div><div id="cdh-ov.Management"><h2 id="_cdh-ov_Management_">4. Management</h2><div id="cdh-ov.Treatment_of_Manifestations"><h3>Treatment of Manifestations</h3><p>Proper management of newborns with CDH must start in the delivery room; recently, investigative therapies may start in the prenatal period. A standardized protocol for neonatal management and treatment of infants with CDH was proposed by the CDH EURO Consortium Consensus [<a class="bk_pop" href="#cdh-ov.REF.reiss.2010.354">Reiss et al 2010</a>], and more recently updated by <a class="bk_pop" href="#cdh-ov.REF.snoek.2016.66">Snoek et al [2016]</a>.</p><p><b>Respiratory support.</b> Emphasis must be on preventing secondary lung injury. Newborns should be intubated immediately in the delivery room to avoid bag-mask ventilation and inflation of bowel that has herniated into the chest. Care should be taken not to induce barotrauma from bag ventilation before the neonate can be transitioned to an appropriate ventilator. In the 1990s, it was recognized that minimizing aggressive ventilation by limiting ventilator settings and/or allowing the neonate to do some of the breathing work resulted in improved outcomes. It was also recognized that infants did not need to be rushed to surgery and benefited from stabilization of respiratory and cardiovascular status prior to diaphragmatic repair. Assuring end-organ perfusion and stability instead of perfect physiologic values or immediate anatomic correction is now the standard of care [<a class="bk_pop" href="#cdh-ov.REF.wung.1995.406">Wung et al 1995</a>, <a class="bk_pop" href="#cdh-ov.REF.boloker.2002.357">Boloker et al 2002</a>, <a class="bk_pop" href="#cdh-ov.REF.mohsenibod.2007.126">Mohseni-Bod & Bohn 2007</a>].</p><p><b>Extracorporeal membrane oxygenation</b> (ECMO) continues to be used frequently in tertiary centers as a rescue therapy for neonates with critical cardiopulmonary deterioration. Critical factors to consider before initiating ECMO are the presence of coexisting anomalies (lethal conditions in particular), gestational age, birth weight, uncontrollable bleeding or uncorrectable bleeding diathesis, intracranial hemorrhage, and outlook of medical management [<a class="bk_pop" href="#cdh-ov.REF.garcia.2014">Garcia et al 2014</a>, <a class="bk_pop" href="#cdh-ov.REF.cairo.2018.981">Cairo et al 2018</a>]. The clinical utility of ECMO in improving overall survival hinges on the selection of the population most likely to benefit [discussed in <a class="bk_pop" href="#cdh-ov.REF.kays.2017.166">Kays 2017</a>].</p><p>Complications of ECMO treatment include air embolism, neurologic complications (e.g., intracranial hemorrhage, infarct, and seizures), cannulation site bleeding, coagulation abnormalities including disseminated intravascular coagulation, left-to-right shunting through the patent ductus arteriosus due to rapid and dramatic decrease in pulmonary hypertension, kidney failure, systemic hypertension, and infection [<a class="bk_pop" href="#cdh-ov.REF.garcia.2014">Garcia et al 2014</a>]. Due to the complex nature of treatment and the severity of possible complications, significant experience and a multidisciplinary team are required to manage individuals on ECMO.</p><p><b>Pulmonary hypertension.</b> Unfortunately, therapies that have been extremely successful in treating the usual persistent pulmonary hypertension of the newborn (PPHN) have not been widely successful in attenuating CDH-associated pulmonary hypertension and right ventricular failure. Evidence and recommendations for the diagnosis, monitoring, and management of pulmonary hypertension are reviewed in the CDH EURO Consortium Consensus – 2015 update [<a class="bk_pop" href="#cdh-ov.REF.snoek.2016.66">Snoek et al 2016</a>]. Since some infants respond to nitric oxide (NO) [<a class="bk_pop" href="#cdh-ov.REF.okuyama.2002.1188">Okuyama et al 2002</a>], a trial of NO with careful documentation of response with echocardiography prior to continuation is warranted. Phosphodiesterase inhibitors have been used in some individuals [<a class="bk_pop" href="#cdh-ov.REF.mohsenibod.2007.126">Mohseni-Bod & Bohn 2007</a>, <a class="bk_pop" href="#cdh-ov.REF.noori.2007.92">Noori et al 2007</a>]. Other therapies that have been introduced in the acute neonatal treatment phase for CDH but are controversial include the use of surfactant and perflubron [<a class="bk_pop" href="#cdh-ov.REF.fauza.2001.1237">Fauza et al 2001</a>, <a class="bk_pop" href="#cdh-ov.REF.hirschl.2003.283">Hirschl et al 2003</a>]. Unfortunately, the lack of large randomized controlled trials makes it difficult to determine which of these treatments may be beneficial. The presence of surfactant deficiency in those with CDH may depend on the sub-population, thus making it difficult to determine whether exogenous surfactant would be efficacious in large trials [<a class="bk_pop" href="#cdh-ov.REF.jani.2009.304">Jani et al 2009</a>, <a class="bk_pop" href="#cdh-ov.REF.janssen.2009.1754">Janssen et al 2009</a>].</p></div><div id="cdh-ov.Surveillance"><h3>Surveillance</h3><p>Since both pre- and postnatal advances in treatment have increased survival of high-risk individuals, it is important to provide close follow up and support for major complications and potential long-term morbidities. Long-term follow up for infants with CDH is ideally provided at a specialized center by a multidisciplinary team consisting of a pediatric surgeon, surgical nurse specialist, cardiologist, nutritionist, pulmonologist, and developmental pediatrician. This type of team can recognize, treat, and coordinate care for the many medical complications frequently found in long-term survivors with CDH.</p></div><div id="cdh-ov.Evaluation_of_Relatives_at_Risk"><h3>Evaluation of Relatives at Risk</h3><p>See <a href="#cdh-ov.Related_Genetic_Counseling_Issues">Genetic Counseling</a> for issues related to testing of at-risk relatives for genetic counseling purposes.</p></div><div id="cdh-ov.Therapies_Under_Investigation"><h3>Therapies Under Investigation</h3><p><b>Prenatal treatment.</b> Treatment of severely affected infants has shifted to the prenatal period, as rescue of severe pulmonary hypoplasia is possible if done at the correct time. The discovery that laryngeal obstruction leads to lung distention from retained fluid prompted tracheal occlusion studies in animal models and in humans [<a class="bk_pop" href="#cdh-ov.REF.lipshutz.1997.1634">Lipshutz et al 1997</a>, <a class="bk_pop" href="#cdh-ov.REF.harrison.2003.1916">Harrison et al 2003</a>]. In one US randomized trial of fetal endoscopic tracheal occlusion, the treatment group experienced a high rate of preterm delivery and did not have improved morbidity or mortality rates [<a class="bk_pop" href="#cdh-ov.REF.harrison.2003.1916">Harrison et al 2003</a>]. However, since that time, advances have been made in tracheal occlusion techniques and in predicting which fetuses would most likely die without any intervention. Currently, high-risk fetuses in Europe or in a few US centers may receive tracheal occlusion by fetal endoscopic balloon placement. The procedure is performed in the second trimester when the observed/expected lung-area to head-circumference ratios are ≤1.0. Generally, fetuses selected for this procedure have isolated CDH (as well as can be determined by prenatal imaging) without chromosome aberrations. Although the treatment remains investigational, initial survival rates in high-risk fetuses are increased [<a class="bk_pop" href="#cdh-ov.REF.araujo_j_nior.2017.297">Araujo Júnior et al 2017</a>].</p><p>Search <a href="https://clinicaltrials.gov/" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">ClinicalTrials.gov</a> in the US and <a href="https://www.clinicaltrialsregister.eu/ctr-search/search" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">EU Clinical Trials Register</a> in Europe for access to information on clinical studies for a wide range of diseases and conditions. Note: There may not be clinical trials for this disorder.</p></div></div><div id="cdh-ov.Genetic_Counseling"><h2 id="_cdh-ov_Genetic_Counseling_">5. Genetic Counseling</h2><p>
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<i>Genetic counseling is the process of providing individuals and families with
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information on the nature, mode(s) of inheritance, and implications of genetic disorders to help them
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make informed medical and personal decisions. The following section deals with genetic
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risk assessment and the use of family history and genetic testing to clarify genetic
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status for family members; it is not meant to address all personal, cultural, or
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ethical issues that may arise or to substitute for consultation with a genetics
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professional</i>. —ED.</p><div id="cdh-ov.Mode_of_Inheritance"><h3>Mode of Inheritance</h3><p>Congenital diaphragmatic hernia (CDH) may occur as an isolated finding, as part of a genetic syndrome or chromosome abnormality, or as part of a complex but nonsyndromic set of findings.</p><p>Kindreds representing both syndromic and nonsyndromic CDH consistent with autosomal dominant, autosomal recessive, and X-linked patterns of inheritance have been reported. Some published pedigrees suggest reduced penetrance and variable expressivity in individuals with heterozygous pathogenic variants associated with autosomal dominant CDH [<a class="bk_pop" href="#cdh-ov.REF.yu.2013.285">Yu et al 2013</a>, <a class="bk_pop" href="#cdh-ov.REF.longoni.2015.362">Longoni et al 2015</a>].</p></div><div id="cdh-ov.Risks_to_Family_Members_of_a_Prob"><h3>Risks to Family Members of a Proband With an Identified Genetic Etiology</h3><p>If a proband is found to have a specific genetic disorder, syndrome, or association with CDH (see <a href="/books/NBK1359/table/cdh-ov.T.congenital_diaphragmatic_hernia/?report=objectonly" target="object" rid-ob="figobcdhovTcongenitaldiaphragmatichernia">Table 1</a>) or an inherited or <i>de novo</i> chromosome abnormality (see <a href="/books/NBK1359/table/cdh-ov.T.chromosome_anomalies_associated/?report=objectonly" target="object" rid-ob="figobcdhovTchromosomeanomaliesassociated">Table 3</a>), recurrence risk depends on the mode of inheritance associated with the condition, and genetic counseling for that condition is indicated.</p></div><div id="cdh-ov.Empiric_Risks_to_Family_Members_o"><h3>Empiric Risks to Family Members of a Proband Without an Identified Genetic Etiology</h3><p>
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<b>Isolated CDH</b>
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</p><ul><li class="half_rhythm"><div>The majority of individuals with isolated CDH represent simplex cases (i.e., the only affected member of the family); however, a few families are multiplex (i.e., ≥2 relatives have isolated CDH).</div></li><li class="half_rhythm"><div>The estimated risk for recurrence of isolated Bochdalek CDH in a sib is less than 2% [<a class="bk_pop" href="#cdh-ov.REF.pober.2005.81">Pober et al 2005</a>]. These studies primarily assessed the frequency of sibs diagnosed with CDH who were born <b>prior</b> to the proband (precurrence); there is no systematic or consecutive series on sib recurrence to date.</div></li></ul><p><b>Complex CDH.</b> Counseling for individuals with complex CDH in whom a specific genetic disorder is not recognized is problematic:</p><ul><li class="half_rhythm"><div>Some cases of complex CDH are probably caused by dominant <i>de novo</i> pathogenic variants, and therefore pose a low recurrence risk to the sibs of the proband.</div></li><li class="half_rhythm"><div>Some are probably unrecognized syndromic conditions.</div></li><li class="half_rhythm"><div>Some may be multifactorial disorders with a low recurrence risk.</div></li><li class="half_rhythm"><div>Non-genetic causes including stochastic events, epigenetic modifications, or teratogenic/environmental exposures are possible as well.</div></li></ul><p>Thus, counseling in this setting should be as for other multiple congenital anomaly disorders of unknown etiology. Specifically, the estimated recurrence risk to sibs is "low," but this estimate represents an averaging of a negligible, or very low, recurrence risk in the majority of families together with a higher recurrence risk (as high as 25%-50%) in the minority of families.</p></div><div id="cdh-ov.Related_Genetic_Counseling_Issues"><h3>Related Genetic Counseling Issues</h3><p><b>Offspring of a proband.</b> A growing number of CDH survivors are reaching their reproductive years due to improved surgical techniques and medical management. At this time, no studies have been conducted to interrogate systematically the recurrence risk in this population. However, in theory, the risk of having a child with CDH could be as high as 50% in an individual with a <i>de novo</i> pathogenic variant or an inherited autosomal dominant pathogenic variant, assuming complete penetrance.</p><p><b>Variable expressivity.</b> The relationship between Bochdalek hernias and muscle migration defects (eventrations) is unknown, but they may be related entities. Both abnormalities have been reported as occurring in different members of the same family and in the same individual, as reported in <a class="bk_pop" href="#cdh-ov.REF.ackerman.2005.58">Ackerman et al [2005]</a> and in individuals with pathogenic variants in the same gene [<a class="bk_pop" href="#cdh-ov.REF.jordan.2018.2064">Jordan et al 2018</a>].</p><p>Among multiplex families with CDH, concordance is extremely high among affected relatives both for the specific type and the side of the diaphragm defect, although the size of the defect can vary. Very occasionally, one affected sib has unilateral CDH while a second affected sib has bilateral CDH, or one sib has an eventration while a second has a diaphragmatic hernia. Also, occasionally, one sib has CDH only while a second affected sib has CDH plus another common birth defect such as a cardiovascular malformation or polydactyly. Whether these latter cases represent differing manifestations of a monogenic condition influenced by genetic modifiers, environmental modifiers, or stochastic fluctuations, or even multifactorial inheritance is not yet known.</p><p><b>Discordant monozygotic twins.</b> Most monozygotic twin pairs in consecutive series are discordant (i.e., one member of the twin pair has CDH while the other twin does not) [<a class="bk_pop" href="#cdh-ov.REF.pober.2005.81">Pober et al 2005</a>, <a class="bk_pop" href="#cdh-ov.REF.veenma.2012.298">Veenma et al 2012</a>, <a class="bk_pop" href="#cdh-ov.REF.wang.2019.1304">Wang et al 2019</a>]. The reason for such high rates of phenotype discordance is presently unknown and a variety of mechanisms, both genetic and non-genetic, could account for these findings. Small cohort studies in discordant monozygotic twins showed no evidence of pathogenic copy number variant discordance [<a class="bk_pop" href="#cdh-ov.REF.veenma.2012.298">Veenma et al 2012</a>] or sequence variant discordance [<a class="bk_pop" href="#cdh-ov.REF.zhang.2016.60">Zhang et al 2016</a>].</p></div><div id="cdh-ov.Prenatal_Testing_and_Preimplantat"><h3>Prenatal Testing and Preimplantation Genetic Testing</h3><p><b>Low-risk pregnancies (i.e., those without a known family history of CDH).</b> The majority of probands with CDH are diagnosed prenatally by ultrasound examination, which demonstrates herniated viscera with or without liver in the fetal thorax, absence of the normal position of the stomach bubble below the diaphragm, and mediastinal shift [<a class="bk_pop" href="#cdh-ov.REF.stege.2003.532">Stege et al 2003</a>, <a class="bk_pop" href="#cdh-ov.REF.tonks.2004.596">Tonks et al 2004</a>]. Although not specific for CDH, polyhydramnios is often detected [<a class="bk_pop" href="#cdh-ov.REF.witters.2001.278">Witters et al 2001</a>].</p><p>When CDH is found on routine prenatal ultrasound examination, both a high-resolution ultrasound examination and fetal MRI to determine the presence of additional structural anomalies are indicated. Chromosome analysis of fetal cells obtained by amniocentesis should be considered in all pregnancies while CMA should strongly be considered when CDH is present in conjunction with additional anomalies. (See <a href="#cdh-ov.Evaluation_Strategies_to_Identify">Evaluation Strategies to Identify the Genetic Cause of Congenital Diaphragmatic Hernia in a Proband</a> for additional details.)</p><p>All fetuses with CDH should be evaluated for the presence of syndromes and/or additional major malformations given that they so commonly coexist and significantly affect the prognosis. Involvement of a clinical geneticist in the evaluation of these families can be helpful. The measurement of either the expected/observed LHR or the lung volume by fetal MRI have been useful to predict outcome; however, since the predictive value of these measurements varies from center to center, results must be interpreted with caution.</p><p><b>High-risk pregnancies (i.e., those with a family history of CDH).</b> Consultation in a high-risk obstetric center should be offered.</p><p>If the genetic cause of CDH has been identified in an affected family member, prenatal and preimplantation genetic testing are possible. Counseling should include a discussion of possible reduced penetrance in autosomal dominant forms of CDH [<a class="bk_pop" href="#cdh-ov.REF.yu.2013.285">Yu et al 2013</a>, <a class="bk_pop" href="#cdh-ov.REF.longoni.2015.362">Longoni et al 2015</a>].</p></div></div><div id="cdh-ov.Resources"><h2 id="_cdh-ov_Resources_">Resources</h2><p>
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<i>GeneReviews staff has selected the following disease-specific and/or umbrella
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support organizations and/or registries for the benefit of individuals with this disorder
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and their families. GeneReviews is not responsible for the information provided by other
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organizations. For information on selection criteria, click <a href="/books/n/gene/app4/">here</a>.</i></p>
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<ul><li class="half_rhythm"><div>
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<b>CDH International</b>
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</div><div><b>Email:</b> info@cdhi.org</div><div>
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<a href="https://cdhi.org/" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">cdhi.org</a>
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</div></li><li class="half_rhythm"><div>
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<b>CDH UK</b>
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</div><div>United Kingdom</div><div><b>Phone:</b> 0800 731 6991</div><div><b>Email:</b> committee@cdhuk.org.uk</div><div>
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<a href="http://www.cdhuk.org.uk/" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">cdhuk.org.uk</a>
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</div></li><li class="half_rhythm"><div>
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<b>Medical Home Portal</b>
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</div><div>
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<a href="https://www.medicalhomeportal.org/diagnoses-and-conditions/congenital-diaphragmatic-hernia" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">Congenital Diaphragmatic Hernia</a>
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</div></li><li class="half_rhythm"><div>
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<b>MedlinePlus</b>
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</div><div>
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<a href="http://www.nlm.nih.gov/medlineplus/ency/article/001135.htm" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">Diaphragmatic hernia</a>
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</div></li><li class="half_rhythm"><div>
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<b>National Organization for Rare Disorders</b>
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</div><div>
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<a href="https://rarediseases.org/gard-rare-disease/1481/congenital-diaphragmatic-hernia/" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">NIH GARD Information: Congenital diaphragmatic hernia</a>
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</div></li><li class="half_rhythm"><div>
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<b>Compassionate Friends</b>
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</div><div>
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<i>Supporting Family After a Child Dies</i>
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</div><div><b>Phone:</b> 877-969-0010</div><div>
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<a href="http://www.compassionatefriends.org" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">compassionatefriends.org</a>
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</div></li><li class="half_rhythm"><div>
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<b>SHARE Pregnancy and Infant Loss Support</b>
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</div><div><b>Phone:</b> 800-821-6819</div><div><b>Email:</b> info@nationalshare.org</div><div>
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<a href="https://nationalshare.org" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">nationalshare.org</a>
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</div></li></ul>
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</div><div id="cdh-ov.Chapter_Notes"><h2 id="_cdh-ov_Chapter_Notes_">Chapter Notes</h2><div id="cdh-ov.Author_History"><h3>Author History</h3><p>Kate Guernsey Ackerman, MD; University of Rochester (2006-2019)<br />Frances A High, MD, PhD (2019-present)<br />Mauro Longoni, MD (2019-present)<br />Barbara R Pober, MD (2006-present)<br />Meaghan K Russell, MPH; MassGeneral Hospital for Children (2006-2019)</p></div><div id="cdh-ov.Revision_History"><h3>Revision History</h3><ul><li class="half_rhythm"><div>5 November 2020 (aa/sw) Revision: added <i>PIGN</i>-related Fryns syndrome; removed MCAHS (not associated with congenital diaphragmatic hernia)</div></li><li class="half_rhythm"><div>28 March 2019 (sw) Comprehensive update posted live</div></li><li class="half_rhythm"><div>16 March 2010 (me) Comprehensive update posted live</div></li><li class="half_rhythm"><div>1 February 2006 (me) Review posted live</div></li><li class="half_rhythm"><div>6 June 2005 (brp) Original submission</div></li></ul></div></div><div id="cdh-ov.References"><h2 id="_cdh-ov_References_">References</h2><div id="cdh-ov.Literature_Cited"><h3>Literature Cited</h3><ul class="simple-list"><li class="half_rhythm"><div class="bk_ref" id="cdh-ov.REF.abman.2015.2037">Abman
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<script type="text/javascript" src="/portal/portal3rc.fcgi/rlib/js/InstrumentNCBIBaseJS/InstrumentPageStarterJS.js"> </script>
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</div>
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</div>
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</div>
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</div><!-- /.twelve_col -->
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</div>
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<span class="PAFAppResources"></span>
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<noscript><img alt="statistics" src="/stat?jsdisabled=true&ncbi_db=books&ncbi_pdid=book-part&ncbi_acc=NBK1359&ncbi_domain=gene&ncbi_report=printable&ncbi_type=fulltext&ncbi_objectid=&ncbi_pcid=/NBK1359/?report=printable&ncbi_app=bookshelf" /></noscript>
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<!--<component id="PageFixtures" label="styles"></component>-->
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<!-- CE8B5AF87C7FFCB1_0191SID /projects/books/PBooks@9.11 portal106 v4.1.r689238 Tue, Oct 22 2024 16:10:51 -->
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<span id="portal-csrf-token" style="display:none" data-token="CE8B5AF87C7FFCB1_0191SID"></span>
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<script type="text/javascript" src="//static.pubmed.gov/portal/portal3rc.fcgi/4216699/js/3879255/4121861/3501987/4008961/3893018/3821238/3400083/3426610.js" snapshot="books"></script></body>
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</html> |