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<meta name="keywords" content="C1969106, autosomal recessive malignant osteopetrosis caused by mutation in clcn7, autosomal recessive osteopetrosis 4, autosomal recessive osteopetrosis caused by mutation in clcn7, autosomal recessive osteopetrosis type 4, clcn7, clcn7 autosomal recessive malignant osteopetrosis, clcn7 autosomal recessive osteopetrosis, clcn7-related osteopetrosis, disease or syndrome, infantile malignant clcn7-related autosomal recessive osteopetrosis, infantile malignant clcn7-related recessive osteopetrosis, infantile malignant osteopetrosis 2, optb4, osteopetrosis autosomal recessive 4, osteopetrosis infantile malignant 2, osteopetrosis, autosomal recessive 4, osteopetrosis, autosomal recessive type 4, osteopetrosis, infantile malignant 2, autosomal dominant, autosomal recessive, birth defects, chromosomal disease, chromosome, clinical features, clinical findings, clinical genetics, clinical recommendations, clinvar, congenital chromosomal disease, consumer genetic resources, cytogenetic location, disease characteristics, disease definitions, disease descriptions, disease ontology, disease synonyms, disease vocabulary, dysmorphology, entrez, familial disease, gene, gene-disease relationship, genereviews, genetic disease, genetic disorder, genetic terminology, genetic testing registry, genetics home reference, genomic disease, gtr, hereditary disease, heritable disease, hpo, human phenotype ontology, inherited disease, management guidelines, maternal inheritance, medgen, medical genetics, medical subject headings, mesh, mitochondrial inheritance, mode of inheritance, national center for biotechnology information, national institutes of health, national library of medicine, ncbi, nih, nlm, omim, ordo, orphanet, paternal inheritance, phenome, position statements, professional practice guidelines, rare disease, reference sequence, refseq, snomed ct, syndrome, undiagnosed diseases, x-linked recessive" /><meta name="description" content="The spectrum of CLCN7-related osteopetrosis includes infantile malignant CLCN7-related autosomal recessive osteopetrosis (ARO), intermediate autosomal osteopetrosis (IAO), and autosomal dominant osteopetrosis type II (ADOII; Albers-Schönberg disease). ARO. Onset is at birth. Findings may include: fractures; reduced growth; sclerosis of the skull base (with or without choanal stenosis or hydrocephalus) resulting in optic nerve compression, facial palsy, and hearing loss; absence of the bone marrow cavity resulting in severe anemia and thrombocytopenia; dental abnormalities, odontomas, and risk for mandibular osteomyelitis; and hypocalcemia with tetanic seizures and secondary hyperparathyroidism. Without treatment maximal life span in ARO is ten years. IAO. Onset is in childhood. Findings may include: fractures after minor trauma, characteristic skeletal radiographic changes found incidentally, mild anemia, and occasional visual impairment secondary to optic nerve compression. Life expectancy in IAO is usually normal. ADOII. Onset is usually late childhood or adolescence. Findings may include: fractures (in any long bone and/or the posterior arch of a vertebra), scoliosis, hip osteoarthritis, and osteomyelitis of the mandible or septic osteitis or osteoarthritis elsewhere. Cranial nerve compression is rare." /><meta name="robots" content="index,nofollow,noarchive" />
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<title>Autosomal recessive osteopetrosis 4 (Concept Id: C1969106)
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<!--
UID=370598
ConceptID=C1969106
-->
<!--imgCountBooks = 2--><div class="ncbi_carousel" data-ncbicarousel-config="imageWidth:'100px',numItemsVisible:2,toggler:false"><div class="nc_header"><span class="img_strip_title">Images (2)</span></div><div class="nc_content"><div class="nc_item"><a class="figpopup"><img alt="Image from GeneReviews" src="/books/NBK1127/bin/clcn7-Image001.gif" src-large="/books/NBK1127/bin/clcn7-Image001.jpg" /></a><br /><a href="/books/NBK1127/figure/clcn7.F1/" title="GeneReviews" target="_blank">details</a></div><div class="nc_item"><a class="figpopup"><img alt="Image from GeneReviews" src="/books/NBK1127/bin/clcn7-Image002.gif" src-large="/books/NBK1127/bin/clcn7-Image002.jpg" /></a><br /><a href="/books/NBK1127/figure/clcn7.F2/" title="GeneReviews" target="_blank">details</a></div></div></div><h1 class="medgenTitle"><div class="MedGenTitleText">Autosomal recessive osteopetrosis 4<span class="h1sub">(OPTB4)</span></div></h1><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>370598</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information."><span class="highlight" style="background-color:">C1969106</span></a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div><table class="medgenTable"><tbody><tr><td>Synonyms:</td>
<td>Infantile Malignant CLCN7-Related Autosomal Recessive Osteopetrosis; infantile malignant CLCN7-related recessive osteopetrosis; Osteopetrosis infantile malignant 2</td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td><a class="help jig-ncbi-popper" data-jig="ncbipopper" href="#target-gene-loc">Gene (location):<img class="pulldown" src="//static.pubmed.gov/portal/portal3rc.fcgi/4223267/img/4204968" /></a><div class="display-none" id="target-gene-loc">
Gene(s) directly associated with<br />
this condition or phenotype.</div></td>
<td><a target="_blank" title="CLCN7 - ID: 1186 - NCBI Gene" href="/gene/1186" class="medgenPMinfo">CLCN7</a> (16p13.3)</td></tr>
<tr><td colspan="2" class="small"> </td></tr><tr><td>Monarch Initiative:</td>
<td><a href="https://monarchinitiative.org/disease/MONDO:0012676" target="_blank">MONDO:0012676</a></td></tr>
<tr><td>OMIM<span class="superscript">®</span>:</td>
<td><a href="https://omim.org/entry/611490" target="_blank">611490</a></td></tr>
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<div class="portlet mgSection" id="ID_101">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Disease_characteristics">Disease characteristics</h1><a sid="101" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><div class="excerpt">Excerpted from the <i>GeneReview: </i><a href="/books/NBK1127" target="_blank">CLCN7-Related Osteopetrosis</a></div><div>The spectrum of CLCN7-related osteopetrosis includes infantile malignant CLCN7-related autosomal recessive osteopetrosis (ARO), intermediate autosomal osteopetrosis (IAO), and autosomal dominant osteopetrosis type II (ADOII; Albers-Schönberg disease). ARO. Onset is at birth. Findings may include: fractures; reduced growth; sclerosis of the skull base (with or without choanal stenosis or hydrocephalus) resulting in optic nerve compression, facial palsy, and hearing loss; absence of the bone marrow cavity resulting in severe anemia and thrombocytopenia; dental abnormalities, odontomas, and risk for mandibular osteomyelitis; and hypocalcemia with tetanic seizures and secondary hyperparathyroidism. Without treatment maximal life span in ARO is ten years. IAO. Onset is in childhood. Findings may include: fractures after minor trauma, characteristic skeletal radiographic changes found incidentally, mild anemia, and occasional visual impairment secondary to optic nerve compression. Life expectancy in IAO is usually normal. ADOII. Onset is usually late childhood or adolescence. Findings may include: fractures (in any long bone and/or the posterior arch of a vertebra), scoliosis, hip osteoarthritis, and osteomyelitis of the mandible or septic osteitis or osteoarthritis elsewhere. Cranial nerve compression is rare. [from <a title="GeneReviews" href="https://www.ncbi.nlm.nih.gov/books/NBK1116" class="defSource" target="_blank">GeneReviews</a>]</div><div class="spaceAbove"><strong>Full text of <i>GeneReview</i> (by section):</strong><br /><a class="medgenPMinfo" href="/books/NBK1127#clcn7.Summary" target="NBK1127">Summary</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.GeneReview_Scope" target="NBK1127">GeneReview Scope</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.Diagnosis" target="NBK1127">Diagnosis</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.Clinical_Characteristics" target="NBK1127">Clinical Characteristics</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.Genetically_Related_Allelic_Disord" target="NBK1127">Genetically Related (Allelic) Disorders</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.Differential_Diagnosis" target="NBK1127">Differential Diagnosis</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.Management" target="NBK1127">Management</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.Genetic_Counseling" target="NBK1127">Genetic Counseling</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.Resources" target="NBK1127">Resources</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.Molecular_Genetics" target="NBK1127">Molecular Genetics</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.Chapter_Notes" target="NBK1127">Chapter Notes</a>  |  <a class="medgenPMinfo" href="/books/NBK1127#clcn7.References" target="NBK1127">References</a></div><div class="spaceAbove"><strong>Authors:</strong><br />
Cristina Sobacchi  |  Anna Villa  |  Ansgar Schulz<i>, et. al.</i>   <a href="/books/NBK1127" target="NBK1127" title="NCBI Bookshelf: CLCN7-Related Osteopetrosis">view full author information</a></div></div>
</div>
<div class="portlet mgSection" id="ID_117">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Additional_descriptions">Additional descriptions</h1><a sid="117" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><div class="mgSection"><strong>From OMIM</strong><br />Autosomal recessive osteopetrosis-4 (OPTB4) is characterized by severe osteosclerosis, pathologic fractures, hepatosplenomegaly, and pancytopenia. Increased bone density and early signs of optic nerve atrophy are apparent in infancy (Cleiren et al., 2001, Lam et al., 2007).&#13;
For a phenotypic description and a discussion of genetic heterogeneity of autosomal recessive osteopetrosis, see OPTB1 (259700).  <a target="_blank" href="http://www.omim.org/entry/611490">http://www.omim.org/entry/611490</a></div><div class="mgSection"><strong>From MedlinePlus Genetics</strong><br />Osteopetrosis is a bone disease that makes bone tissue abnormally compact and dense and also prone to breakage (fracture). Researchers have described several major types of osteopetrosis, which are usually distinguished by their pattern of inheritance: autosomal dominant or autosomal recessive. The different types of the disorder can also be distinguished by the severity of their signs and symptoms.<br /><br />In individuals with ADO who develop signs and symptoms, the major features of the condition include multiple bone fractures after minor injury, abnormal side-to-side curvature of the spine (scoliosis) or other spinal abnormalities, arthritis in the hips, and a bone infection called osteomyelitis. These problems usually become apparent in late childhood or adolescence.<br /><br />Autosomal recessive osteopetrosis (ARO) is a more severe form of the disorder that becomes apparent in early infancy. Affected individuals have a high risk of bone fracture resulting from seemingly minor bumps and falls. Their abnormally dense skull bones pinch nerves in the head and face (cranial nerves), often resulting in vision loss, hearing loss, and paralysis of facial muscles. Dense bones can also impair the function of bone marrow, preventing it from producing new blood cells and immune system cells. As a result, people with severe osteopetrosis are at risk of abnormal bleeding, a shortage of red blood cells (anemia), and recurrent infections. In the most severe cases, these bone marrow abnormalities can be life-threatening in infancy or early childhood.<br /><br />A few individuals have been diagnosed with intermediate autosomal osteopetrosis (IAO), a form of the disorder that can have either an autosomal dominant or an autosomal recessive pattern of inheritance. The signs and symptoms of this condition become noticeable in childhood and include an increased risk of bone fracture and anemia. People with this form of the disorder typically do not have life-threatening bone marrow abnormalities. However, some affected individuals have had abnormal calcium deposits (calcifications) in the brain, intellectual disability, and a form of kidney disease called renal tubular acidosis.<br /><br />Autosomal dominant osteopetrosis (ADO), which is also called Albers-Schönberg disease, is typically the mildest type of the disorder. Some affected individuals have no symptoms. In affected people with no symptoms, the unusually dense bones may be discovered by accident when an x-ray is done for another reason. <br /><br />Other features of autosomal recessive osteopetrosis can include slow growth and short stature, dental abnormalities, and an enlarged liver and spleen (hepatosplenomegaly). Depending on the genetic changes involved, people with severe osteopetrosis can also have brain abnormalities, intellectual disability, or recurrent seizures (epilepsy).  <a target="_blank" href="https://medlineplus.gov/genetics/condition/osteopetrosis">https://medlineplus.gov/genetics/condition/osteopetrosis</a></div></div>
</div>
<div class="portlet mgSection" id="ID_102">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Clinical_features">Clinical features</h1><a sid="102" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln clinfeat"><strong>From HPO</strong><br />
<div class="divPopper rprt" id="clin_99124"><div><strong>Growth delay</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>99124</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0456070</a></dd><dt><span class="dotprefix"></span></dt><dd>Pathologic Function</dd></dl></div></div></div>
<div class="spaceAbove">A deficiency or slowing down of growth pre- and postnatally.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/99124">Feature record</a> | <a href="/medgen?term=%22Growth%20delay%22%5BClinical%20Features%5D%20OR%2099124%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_42428"><div><strong>Hepatomegaly</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>42428</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0019209</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Abnormally increased size of the liver.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/42428">Feature record</a> | <a href="/medgen?term=%22Hepatomegaly%22%5BClinical%20Features%5D%20OR%2042428%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_1526"><div><strong>Anemia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1526</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0002871</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">A reduction in erythrocytes volume or hemoglobin concentration.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1526">Feature record</a> | <a href="/medgen?term=%22Anemia%22%5BClinical%20Features%5D%20OR%201526%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_52737"><div><strong>Thrombocytopenia</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>52737</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0040034</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">A reduction in the number of circulating thrombocytes.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/52737">Feature record</a> | <a href="/medgen?term=%22Thrombocytopenia%22%5BClinical%20Features%5D%20OR%2052737%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_60089"><div><strong>Reticulocytosis</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>60089</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0206160</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">An elevation in the number of reticulocytes (immature erythrocytes) in the peripheral blood circulation.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/60089">Feature record</a> | <a href="/medgen?term=%22Reticulocytosis%22%5BClinical%20Features%5D%20OR%2060089%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_42094"><div><strong>Recurrent fractures</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>42094</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0016655</a></dd><dt><span class="dotprefix"></span></dt><dd>Injury or Poisoning</dd></dl></div></div></div>
<div class="spaceAbove">The repeated occurrence of bone fractures (implying an abnormally increased tendency for fracture).</div>
<div class="spaceAbove nowrap">See: <a href="/medgen?term=%22Recurrent%20fractures%22%5BClinical%20Features%5D%20OR%2042094%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_18223"><div><strong>Osteopetrosis</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>18223</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0029454</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Abnormally increased formation of dense trabecular bone tissue. Despite the increased density of bone tissue, osteopetrotic bones tend to be more fracture-prone than normal.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/18223">Feature record</a> | <a href="/medgen?term=%22Osteopetrosis%22%5BClinical%20Features%5D%20OR%2018223%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_10502"><div><strong>Increased bone mineral density</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>10502</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0029464</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">An abnormal increase of bone mineral density, that is, of the amount of matter per cubic centimeter of bones which is often referred to as osteosclerosis. Osteosclerosis can be detected on radiological examination as an increased whiteness (density) of affected bones.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/10502">Feature record</a> | <a href="/medgen?term=%22Increased%20bone%20mineral%20density%22%5BClinical%20Features%5D%20OR%2010502%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_87660"><div><strong>Facial palsy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>87660</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0376175</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Facial nerve palsy is a dysfunction of cranial nerve VII (the facial nerve) that results in inability to control facial muscles on the affected side with weakness of the muscles of facial expression and eye closure. This can either be present in unilateral or bilateral form.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/87660">Feature record</a> | <a href="/medgen?term=%22Facial%20palsy%22%5BClinical%20Features%5D%20OR%2087660%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_1642576"><div><strong>Sclerotic vertebral endplates</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>1642576</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C4551970</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Sclerosis (increased density) affecting vertebral end plates.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/1642576">Feature record</a> | <a href="/medgen?term=%22Sclerotic%20vertebral%20endplates%22%5BClinical%20Features%5D%20OR%201642576%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_52469"><div><strong>Splenomegaly</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>52469</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0038002</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Abnormal increased size of the spleen.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/52469">Feature record</a> | <a href="/medgen?term=%22Splenomegaly%22%5BClinical%20Features%5D%20OR%2052469%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_10680"><div><strong>Petechiae</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>10680</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0031256</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Petechiae are pinpoint-sized reddish/purple spots, resembling a rash, that appear just under the skin or a mucous membrane when capillaries have ruptured and some superficial bleeding into the skin has happened. This term refers to an abnormally increased susceptibility to developing petechiae.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/10680">Feature record</a> | <a href="/medgen?term=%22Petechiae%22%5BClinical%20Features%5D%20OR%2010680%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_18180"><div><strong>Optic atrophy</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>18180</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0029124</a></dd><dt><span class="dotprefix"></span></dt><dd>Disease or Syndrome</dd></dl></div></div></div>
<div class="spaceAbove">Atrophy of the optic nerve. Optic atrophy results from the death of the retinal ganglion cell axons that comprise the optic nerve and manifesting as a pale optic nerve on fundoscopy.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/18180">Feature record</a> | <a href="/medgen?term=%22Optic%20atrophy%22%5BClinical%20Features%5D%20OR%2018180%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_108218"><div><strong>Optic disc pallor</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>108218</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C0554970</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">A pale yellow discoloration of the optic disc (the area of the optic nerve head in the retina). The optic disc normally has a pinkish hue with a central yellowish depression.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/108218">Feature record</a> | <a href="/medgen?term=%22Optic%20disc%20pallor%22%5BClinical%20Features%5D%20OR%20108218%5Buid%5D">Search on this feature</a></div></div>
<div class="divPopper rprt" id="clin_777085"><div><strong>Visual impairment</strong><div class="aux"><div class="resc"><dl class="rprtid"><dt>MedGen UID: </dt><dd>777085</dd><dt><span class="dotprefix"></span>Concept ID: </dt><dd><a href="/medgen/docs/help/#sources" target="_blank" title="Concept Unique Identifier from NLM's Unified Medical Language system (UMLS)&#10;Click for more information.">C3665347</a></dd><dt><span class="dotprefix"></span></dt><dd>Finding</dd></dl></div></div></div>
<div class="spaceAbove">Visual impairment (or vision impairment) is vision loss (of a person) to such a degree as to qualify as an additional support need through a significant limitation of visual capability resulting from either disease, trauma, or congenital or degenerative conditions that cannot be corrected by conventional means, such as refractive correction, medication, or surgery.</div>
<div class="spaceAbove nowrap">See: <a href="/medgen/777085">Feature record</a> | <a href="/medgen?term=%22Visual%20impairment%22%5BClinical%20Features%5D%20OR%20777085%5Buid%5D">Search on this feature</a></div></div><div class="TreeLite" data-jigconfig="closed: 1"><div class="concept-def"><a class="small" href="#" onclick="jQuery(&quot;.TreeLite&quot;,&quot;#ID_102&quot;).TreeLite().openAll(); return false;">Show all</a><a class="small" href="#" onclick="jQuery(&quot;.TreeLite&quot;,&quot;#ID_102&quot;).TreeLite().closeAll(); return false;">Hide all</a></div><ul><li><span class="TLline">Abnormality of blood and blood-forming tissues</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_1526" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Anemia</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_60089" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Reticulocytosis</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_52737" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Thrombocytopenia</a></span></li></ul></li><li><span class="TLline">Abnormality of the digestive system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_42428" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Hepatomegaly</a></span></li></ul></li><li><span class="TLline">Abnormality of the eye</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_18180" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Optic atrophy</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_108218" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Optic disc pallor</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_777085" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Visual impairment</a></span></li></ul></li><li><span class="TLline">Abnormality of the immune system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_52469" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Splenomegaly</a></span></li></ul></li><li><span class="TLline">Abnormality of the integument</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_10680" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Petechiae</a></span></li></ul></li><li><span class="TLline">Abnormality of the musculoskeletal system</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_87660" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Facial palsy</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_10502" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Increased bone mineral density</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_18223" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Osteopetrosis</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_42094" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Recurrent fractures</a></span></li><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_1642576" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Sclerotic vertebral endplates</a></span></li></ul></li><li><span class="TLline">Growth abnormality</span><ul><li class="TLline">
<span class="TLline"><a title="click for more information" class="jig-ncbipopper" href="#clin_99124" data-jigconfig="hasArrow: true, openEvent: 'click', closeEvent: 'mouseout', openAnimation: 'fadeIn', closeAnimation: 'fadeOut', triggerPosition: 'center right', destPosition: 'center left', arrowDirection: 'left'">Growth delay</a></span></li></ul></li></ul></div></div>
</div>
<div class="portlet mgSection" id="ID_105">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Professional_guidelines">Professional guidelines</h1><a sid="105" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><h3 class="subhead">PubMed<a class="help jig-ncbi-popper" data-jig="ncbipopper" href="#guidelinesHelpPM"><img class="pulldown" src="//static.pubmed.gov/portal/portal3rc.fcgi/4223267/img/4204968" /></a></h3>
<div class="nl"><a target="_blank" href="/pubmed/23877423">Osteopetrosis: genetics, treatment and new insights into osteoclast function.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Sobacchi C,
Schulz A,
Coxon FP,
Villa A,
Helfrich MH</span><br />
<span class="medgenPMjournal">Nat Rev Endocrinol</span>
2013 Sep;9(9):522-36.
Epub 2013 Jul 23
doi: 10.1038/nrendo.2013.137.
<span class="bold">PMID: </span><a href="/pubmed/23877423" target="_blank">23877423</a></div>
<div class="nl"><a target="_blank" href="/pubmed/19802031">Characterization and management of hypercalcemia following transplantation for osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Martinez C,
Polgreen LE,
DeFor TE,
Kivisto T,
Petryk A,
Tolar J,
Orchard PJ</span><br />
<span class="medgenPMjournal">Bone Marrow Transplant</span>
2010 May;45(5):939-44.
Epub 2009 Oct 5
doi: 10.1038/bmt.2009.277.
<span class="bold">PMID: </span><a href="/pubmed/19802031" target="_blank">19802031</a><a href="/pmc/articles/PMC5676308" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/16118345">Clinical, genetic, and cellular analysis of 49 osteopetrotic patients: implications for diagnosis and treatment.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Del Fattore A,
Peruzzi B,
Rucci N,
Recchia I,
Cappariello A,
Longo M,
Fortunati D,
Ballanti P,
Iacobini M,
Luciani M,
Devito R,
Pinto R,
Caniglia M,
Lanino E,
Messina C,
Cesaro S,
Letizia C,
Bianchini G,
Fryssira H,
Grabowski P,
Shaw N,
Bishop N,
Hughes D,
Kapur RP,
Datta HK,
Taranta A,
Fornari R,
Migliaccio S,
Teti A</span><br />
<span class="medgenPMjournal">J Med Genet</span>
2006 Apr;43(4):315-25.
Epub 2005 Aug 23
doi: 10.1136/jmg.2005.036673.
<span class="bold">PMID: </span><a href="/pubmed/16118345" target="_blank">16118345</a><a href="/pmc/articles/PMC2563229" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=(autosomal%20recessive%20osteopetrosis%204)%20AND%20(%22english%20and%20humans%22%5BFilter%5D)%20AND%20(%20(%22practice%20guideline%22%5BFilter%5D)%20OR%20(practice*%5Btitl%5D%20AND%20(guideline%5Btitl%5D%20OR%20parameter%5Btitl%5D%20OR%20resource%5Btitl%5D%20OR%20bulletin%5Btitl%5D%20OR%20best%5Btitl%5D))%20OR%20(genetic*%5Btitl%5D%20AND%20(evaluation%5Btitl%5D%20OR%20counseling%5Btitl%5D%20OR%20screening%5Btitl%5D%20OR%20test*%5Btitl%5D))%20OR%20(clinical%5Btitl%5D%20AND%20((expert%5Btitl%5D%20AND%20consensus%5Btitl%5D)%20OR%20utility%5Btitl%5D%20OR%20guideline*%5Btitl%5D))%20OR%20(management%5Btitl%5D%20AND%20(clinical%5Btitl%5D%20OR%20diagnos*%5Btitl%5D%20OR%20recommendation%5Btitl%5D%20OR%20pain%5Btitl%5D%20OR%20surveillance%5Btitl%5D%20OR%20emergency%5Btitl%5D%20OR%20guideline*%5Btitl%5D%20OR%20therap*))%20OR%20(treatment%5Btitl%5D%20AND%20((evaluation%5Btitl%5D%20AND%20diagnosis%5Btitl%5D)%20OR%20(assessment%5Btitl%5D%20AND%20prevention%5Btitl%5D)%20OR%20therap*))%20OR%20(Diagnos*%5Btitl%5D%20AND%20(prenatal%5Btitl%5D%20OR%20treatment%5Btitl%5D%20OR%20follow-up%5Btitl%5D%20OR%20statement%5Btitl%5D%20OR%20criteria%5Btitl%5D%20OR%20newborn%5Btitl%5D%20OR%20differential%5Btitl%5D%20OR%20neonatal%5Btitl%5D%20OR%20neonate%5Btitl%5D))%20OR%20(guideline*%5Btitl%5D%20AND%20(pharmacogenetic*%5Btitl%5D%20OR%20recommendation%5Btitl%5D%20OR%20therap*%5Btitl%5D%20OR%20evidence-based%5Btitl%5D%20OR%20consensus%5Btitl%5D%20OR%20(technical%5Btitl%5D%20AND%20standard*%5Btitl%5D)%20OR%20(molecular%5Btitl%5D%20AND%20testing%5Btitl%5D)))%20OR%20(risk%5Btitl%5D%20AND%20assessment%5Btitl%5D)%20OR%20(recommendation*%5Btitl%5D%20AND%20(statement%5Btitl%5D%20OR%20Evidence-based%5Btitl%5D%20OR%20Consensus%5Btitl%5D))%20OR%20(care%20AND%20((Patient%5Btitl%5D%20AND%20standard*%5Btitl%5D)%20OR%20primary%5Btitl%5D%20OR%20psychosocial%5Btitl%5D))%20OR%20(Health%5Btitl%5D%20AND%20supervision%5Btitl%5D)%20OR%20(statement%5Btitl%5D%20AND%20(policy%5Btitl%5D%20OR%20position%5Btitl%5D%20OR%20Consensus%5Btitl%5D))%20OR%20(pharmacogenetics%5Btitl%5D%20AND%20(Dosing%5Btitl%5D%20OR%20therap*%5Btitl%5D%20OR%20genotype*%5Btitl%5D%20OR%20drug*%5Btitl%5D))%20OR%20(Chemotherapy%5Btitl%5D%20AND%20decision*%5Btitl%5D)%20OR%20(screening%5Btitl%5D%20AND%20(newborn%5Btitl%5D%20OR%20neonat*%5Btitl%5D%20OR%20detection%5Btitl%5D%20OR%20diagnos*%5Btitl%5D))%20OR%20(criteria%5Btitl%5D%20OR%20genotype*%5Btitl%5D)%20)%20NOT%20(%22Case%20reports%22%5BPublication%20type%5D%20OR%20%22clinical%20study%22%5BPublication%20Type%5D%20OR%20%22randomized%20controlled%20trial%22%5BPublication%20Type%5D)" title="PubMed search">See all (4)</a></div></div>
</div>
<div class="display-none help-popup" id="guidelinesHelpPM">These guidelines are articles in PubMed that match specific search criteria developed by MedGen to capture the most relevant practice guidelines. This list may not be comprehensive and may include broader topics as well. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div><div class="display-none help-popup" id="guidelinesHelpCurated">These guidelines are manually curated by the MedGen team
to supplement articles available in PubMed. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div>
<div class="portlet mgSection" id="ID_103">
<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Recent_clinical_studies">Recent clinical studies</h1><a sid="103" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><h3 class="subhead">Etiology</h3>
<div class="nl"><a target="_blank" href="/pubmed/34668226">SLC4A2 Deficiency Causes a New Type of Osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Xue JY,
Grigelioniene G,
Wang Z,
Nishimura G,
Iida A,
Matsumoto N,
Tham E,
Miyake N,
Ikegawa S,
Guo L</span><br />
<span class="medgenPMjournal">J Bone Miner Res</span>
2022 Feb;37(2):226-235.
Epub 2021 Nov 11
doi: 10.1002/jbmr.4462.
<span class="bold">PMID: </span><a href="/pubmed/34668226" target="_blank">34668226</a></div>
<div class="nl"><a target="_blank" href="/pubmed/24819526">Prosthetic aspects in adult osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Ogino Y,
Ayukawa Y,
Tomita Y,
Koyano K</span><br />
<span class="medgenPMjournal">J Prosthet Dent</span>
2014 Oct;112(4):736-40.
Epub 2014 May 10
doi: 10.1016/j.prosdent.2014.04.007.
<span class="bold">PMID: </span><a href="/pubmed/24819526" target="_blank">24819526</a></div>
<div class="nl"><a target="_blank" href="/pubmed/21187637">Autosomal-dominant osteopetrosis: an incidental finding.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Rajathi M,
Austin RD,
Mathew P,
Bharathi CS,
Srivastava KC</span><br />
<span class="medgenPMjournal">Indian J Dent Res</span>
2010 Oct-Dec;21(4):611-4.
doi: 10.4103/0970-9290.74234.
<span class="bold">PMID: </span><a href="/pubmed/21187637" target="_blank">21187637</a></div>
<div class="nl"><a target="_blank" href="/pubmed/19232111">Osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Stark Z,
Savarirayan R</span><br />
<span class="medgenPMjournal">Orphanet J Rare Dis</span>
2009 Feb 20;4:5.
doi: 10.1186/1750-1172-4-5.
<span class="bold">PMID: </span><a href="/pubmed/19232111" target="_blank">19232111</a><a href="/pmc/articles/PMC2654865" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/16015181">Otologic manifestations of malignant osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Dozier TS,
Duncan IM,
Klein AJ,
Lambert PR,
Key LL Jr</span><br />
<span class="medgenPMjournal">Otol Neurotol</span>
2005 Jul;26(4):762-6.
doi: 10.1097/01.mao.0000178139.27472.8d.
<span class="bold">PMID: </span><a href="/pubmed/16015181" target="_blank">16015181</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Autosomal%20recessive%20osteopetrosis%204%22%20AND%20Etiology%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (22)</a></div><h3 class="subhead">Diagnosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/37672091">Osteopetrorickets: two contradictory patterns-one unifying diagnosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Behr G,
Kuhn M,
Oved JH,
Sulis ML</span><br />
<span class="medgenPMjournal">Skeletal Radiol</span>
2024 Apr;53(4):817-820.
Epub 2023 Sep 6
doi: 10.1007/s00256-023-04443-z.
<span class="bold">PMID: </span><a href="/pubmed/37672091" target="_blank">37672091</a><a href="/pmc/articles/PMC11376466" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/23877423">Osteopetrosis: genetics, treatment and new insights into osteoclast function.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Sobacchi C,
Schulz A,
Coxon FP,
Villa A,
Helfrich MH</span><br />
<span class="medgenPMjournal">Nat Rev Endocrinol</span>
2013 Sep;9(9):522-36.
Epub 2013 Jul 23
doi: 10.1038/nrendo.2013.137.
<span class="bold">PMID: </span><a href="/pubmed/23877423" target="_blank">23877423</a></div>
<div class="nl"><a target="_blank" href="/pubmed/20954561">Mild autosomal recessive osteopetrosis: successful treatment with bone marrow transplant.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Othman IS,
Ibrahim H,
Hii KC,
Ong GB,
Menon BS</span><br />
<span class="medgenPMjournal">Med J Malaysia</span>
2009 Dec;64(4):325-6.
<span class="bold">PMID: </span><a href="/pubmed/20954561" target="_blank">20954561</a></div>
<div class="nl"><a target="_blank" href="/pubmed/19232111">Osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Stark Z,
Savarirayan R</span><br />
<span class="medgenPMjournal">Orphanet J Rare Dis</span>
2009 Feb 20;4:5.
doi: 10.1186/1750-1172-4-5.
<span class="bold">PMID: </span><a href="/pubmed/19232111" target="_blank">19232111</a><a href="/pmc/articles/PMC2654865" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/12541186">Osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Stoker DJ</span><br />
<span class="medgenPMjournal">Semin Musculoskelet Radiol</span>
2002 Dec;6(4):299-305.
doi: 10.1055/s-2002-36728.
<span class="bold">PMID: </span><a href="/pubmed/12541186" target="_blank">12541186</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Autosomal%20recessive%20osteopetrosis%204%22%20AND%20Diagnosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (35)</a></div><h3 class="subhead">Therapy</h3>
<div class="nl"><a target="_blank" href="/pubmed/28726516">Targeting NSG Mice Engrafting Cells with a Clinically Applicable Lentiviral Vector Corrects Osteoclasts in Infantile Malignant Osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Moscatelli I,
Löfvall H,
Schneider Thudium C,
Rothe M,
Montano C,
Kertész Z,
Sirin M,
Schulz A,
Schambach A,
Henriksen K,
Richter J</span><br />
<span class="medgenPMjournal">Hum Gene Ther</span>
2018 Aug;29(8):938-949.
Epub 2017 Oct 3
doi: 10.1089/hum.2017.053.
<span class="bold">PMID: </span><a href="/pubmed/28726516" target="_blank">28726516</a></div>
<div class="nl"><a target="_blank" href="/pubmed/25504019">A fatal case of infantile malignant osteopetrosis complicated by pulmonary arterial hypertension after hematopoietic stem cell transplantation.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Kuroyanagi Y,
Kawasaki H,
Noda Y,
Ohmachi T,
Sekiya S,
Yoshimura K,
Ohe C,
Michigami T,
Ozono K,
Kaneko K</span><br />
<span class="medgenPMjournal">Tohoku J Exp Med</span>
2014 Dec;234(4):309-12.
doi: 10.1620/tjem.234.309.
<span class="bold">PMID: </span><a href="/pubmed/25504019" target="_blank">25504019</a></div>
<div class="nl"><a target="_blank" href="/pubmed/19802031">Characterization and management of hypercalcemia following transplantation for osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Martinez C,
Polgreen LE,
DeFor TE,
Kivisto T,
Petryk A,
Tolar J,
Orchard PJ</span><br />
<span class="medgenPMjournal">Bone Marrow Transplant</span>
2010 May;45(5):939-44.
Epub 2009 Oct 5
doi: 10.1038/bmt.2009.277.
<span class="bold">PMID: </span><a href="/pubmed/19802031" target="_blank">19802031</a><a href="/pmc/articles/PMC5676308" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/20954561">Mild autosomal recessive osteopetrosis: successful treatment with bone marrow transplant.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Othman IS,
Ibrahim H,
Hii KC,
Ong GB,
Menon BS</span><br />
<span class="medgenPMjournal">Med J Malaysia</span>
2009 Dec;64(4):325-6.
<span class="bold">PMID: </span><a href="/pubmed/20954561" target="_blank">20954561</a></div>
<div class="nl"><a target="_blank" href="/pubmed/3920916">Failure of acetazolamide to decrease intraocular pressure in patients with carbonic anhydrase II deficiency.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Krupin T,
Sly WS,
Whyte MP,
Dodgson SJ</span><br />
<span class="medgenPMjournal">Am J Ophthalmol</span>
1985 Apr 15;99(4):396-9.
doi: 10.1016/0002-9394(85)90004-2.
<span class="bold">PMID: </span><a href="/pubmed/3920916" target="_blank">3920916</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Autosomal%20recessive%20osteopetrosis%204%22%20AND%20Therapy%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (5)</a></div><h3 class="subhead">Prognosis</h3>
<div class="nl"><a target="_blank" href="/pubmed/37349768">Brain abnormalities, neurodegeneration, and dysosteosclerosis (BANDDOS): new cases, systematic literature review, and associations with CSF1R-ALSP.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Dulski J,
Souza J,
Santos ML,
Wszolek ZK</span><br />
<span class="medgenPMjournal">Orphanet J Rare Dis</span>
2023 Jun 22;18(1):160.
doi: 10.1186/s13023-023-02772-9.
<span class="bold">PMID: </span><a href="/pubmed/37349768" target="_blank">37349768</a><a href="/pmc/articles/PMC10288773" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/31111556">Novel c.G630A TCIRG1 mutation causes aberrant splicing resulting in an unusually mild form of autosomal recessive osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Zirngibl RA,
Wang A,
Yao Y,
Manolson MF,
Krueger J,
Dupuis L,
Mendoza-Londono R,
Voronov I</span><br />
<span class="medgenPMjournal">J Cell Biochem</span>
2019 Oct;120(10):17180-17193.
Epub 2019 May 20
doi: 10.1002/jcb.28979.
<span class="bold">PMID: </span><a href="/pubmed/31111556" target="_blank">31111556</a></div>
<div class="nl"><a target="_blank" href="/pubmed/16015181">Otologic manifestations of malignant osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Dozier TS,
Duncan IM,
Klein AJ,
Lambert PR,
Key LL Jr</span><br />
<span class="medgenPMjournal">Otol Neurotol</span>
2005 Jul;26(4):762-6.
doi: 10.1097/01.mao.0000178139.27472.8d.
<span class="bold">PMID: </span><a href="/pubmed/16015181" target="_blank">16015181</a></div>
<div class="nl"><a target="_blank" href="/pubmed/15305537">Optic nerve compression in infantile malignant autosomal recessive osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Cummings TJ,
Proia AD</span><br />
<span class="medgenPMjournal">J Pediatr Ophthalmol Strabismus</span>
2004 Jul-Aug;41(4):241-4.
doi: 10.3928/0191-3913-20040701-15.
<span class="bold">PMID: </span><a href="/pubmed/15305537" target="_blank">15305537</a></div>
<div class="nl"><a target="_blank" href="/pubmed/7420221">Osteopetrosis: further heterogeneity.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Horton WA,
Schimke RN,
Iyama T</span><br />
<span class="medgenPMjournal">J Pediatr</span>
1980 Oct;97(4):580-5.
doi: 10.1016/s0022-3476(80)80012-6.
<span class="bold">PMID: </span><a href="/pubmed/7420221" target="_blank">7420221</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Autosomal%20recessive%20osteopetrosis%204%22%20AND%20Prognosis%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (22)</a></div><h3 class="subhead">Clinical prediction guides</h3>
<div class="nl"><a target="_blank" href="/pubmed/37349768">Brain abnormalities, neurodegeneration, and dysosteosclerosis (BANDDOS): new cases, systematic literature review, and associations with CSF1R-ALSP.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Dulski J,
Souza J,
Santos ML,
Wszolek ZK</span><br />
<span class="medgenPMjournal">Orphanet J Rare Dis</span>
2023 Jun 22;18(1):160.
doi: 10.1186/s13023-023-02772-9.
<span class="bold">PMID: </span><a href="/pubmed/37349768" target="_blank">37349768</a><a href="/pmc/articles/PMC10288773" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div class="nl"><a target="_blank" href="/pubmed/30898715">TCIRG1 and SNX10 gene mutations in the patients with autosomal recessive osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Koçak G,
Güzel BN,
Mıı E,
Küpesiz OA,
Yalçın K,
Manguoğlu AE</span><br />
<span class="medgenPMjournal">Gene</span>
2019 Jun 20;702:83-88.
Epub 2019 Mar 19
doi: 10.1016/j.gene.2019.02.088.
<span class="bold">PMID: </span><a href="/pubmed/30898715" target="_blank">30898715</a></div>
<div class="nl"><a target="_blank" href="/pubmed/29624226">Clinical and imaging features of malignant infantile osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Tfifha M,
Gaha M,
Gamaoun W,
Chemli J,
Mabrouk S,
Hassayoun S,
Zouari N,
Jemni H,
Abroug S</span><br />
<span class="medgenPMjournal">Turk J Pediatr</span>
2017;59(4):452-457.
doi: 10.24953/turkjped.2017.04.012.
<span class="bold">PMID: </span><a href="/pubmed/29624226" target="_blank">29624226</a></div>
<div class="nl"><a target="_blank" href="/pubmed/16015181">Otologic manifestations of malignant osteopetrosis.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Dozier TS,
Duncan IM,
Klein AJ,
Lambert PR,
Key LL Jr</span><br />
<span class="medgenPMjournal">Otol Neurotol</span>
2005 Jul;26(4):762-6.
doi: 10.1097/01.mao.0000178139.27472.8d.
<span class="bold">PMID: </span><a href="/pubmed/16015181" target="_blank">16015181</a></div>
<div class="nl"><a target="_blank" href="/pubmed/1549660">Cranial imaging in autosomal recessive osteopetrosis. Part II. Skull base and brain.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Elster AD,
Theros EG,
Key LL,
Chen MY</span><br />
<span class="medgenPMjournal">Radiology</span>
1992 Apr;183(1):137-44.
doi: 10.1148/radiology.183.1.1549660.
<span class="bold">PMID: </span><a href="/pubmed/1549660" target="_blank">1549660</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Autosomal%20recessive%20osteopetrosis%204%22%20AND%20Clinical%20prediction%20guides%2Fbroad%5Bfilter%5D%20%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (19)</a></div></div>
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<div class="nl"><a target="_blank" href="/pubmed/37349768">Brain abnormalities, neurodegeneration, and dysosteosclerosis (BANDDOS): new cases, systematic literature review, and associations with CSF1R-ALSP.</a></div>
<div class="portlet_content ln"><span class="medgenPMauthor">Dulski J,
Souza J,
Santos ML,
Wszolek ZK</span><br />
<span class="medgenPMjournal">Orphanet J Rare Dis</span>
2023 Jun 22;18(1):160.
doi: 10.1186/s13023-023-02772-9.
<span class="bold">PMID: </span><a href="/pubmed/37349768" target="_blank">37349768</a><a href="/pmc/articles/PMC10288773" target="_blank" class="PubMedFree">Free PMC Article</a></div>
<div><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=%22Autosomal%20recessive%20osteopetrosis%204%22%20AND%20systematic%5Bsb%5D%20AND%20%22english%20and%20humans%22%5Bfilter%5D%20NOT%20comment%5BPTYP%5D%20NOT%20letter%5BPTYP%5D" title="PubMed search">See all (1)</a></div></div>
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<div class="portlet_content ln"><ul id="my-toc"></ul></div>
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<div class="portlet_content ln"><ul><li><a href="/gtr/tests?term=C1969106%5bDISCUI%5d&amp;filter=method%3A2%5F8" target="_blank">Deletion/duplication analysis (27)</a></li>
<li><a href="/gtr/tests?term=C1969106%5bDISCUI%5d&amp;filter=method%3A2%5F7" target="_blank">Sequence analysis of the entire coding region (27)</a></li>
<li><a href="/gtr/tests?term=C1969106%5bDISCUI%5d&amp;filter=method%3A2%5F19" target="_blank">Targeted variant analysis (14)</a></li>
<li class="portletSeeAll portletSeeAllPad"><total><a href="/gtr/tests?term=C1969106%5bDISCUI%5d" target="_blank">See all (37)</a></total></li>
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<div class="portlet_content ln"><ul><li><a href="https://www.omim.org/search?index=entry&amp;start=1&amp;limit=10&amp;sort=score%20desc&amp;field=number&amp;search=611490" target="_blank">OMIM</a></li><li><a href="https://clinicaltrials.gov/search?cond=Autosomal%20recessive%20osteopetrosis%204" target="_blank">ClinicalTrials.gov</a></li></ul></div>
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<div class="portlet_head mgSectionHead ui-widget-header"><h1 class="nl" id="Practice_guidelines">Practice guidelines</h1><a sid="121" href="#" class="portlet_shutter" title="Show/hide content"></a></div>
<div class="portlet_content ln"><ul class="a_poppers"><li><a target="_blank" href="https://pubmed.ncbi.nlm.nih.gov/?term=(autosomal%20recessive%20osteopetrosis%204)%20AND%20(%22english%20and%20humans%22%5BFilter%5D)%20AND%20(%20(%22practice%20guideline%22%5BFilter%5D)%20OR%20(practice*%5Btitl%5D%20AND%20(guideline%5Btitl%5D%20OR%20parameter%5Btitl%5D%20OR%20resource%5Btitl%5D%20OR%20bulletin%5Btitl%5D%20OR%20best%5Btitl%5D))%20OR%20(genetic*%5Btitl%5D%20AND%20(evaluation%5Btitl%5D%20OR%20counseling%5Btitl%5D%20OR%20screening%5Btitl%5D%20OR%20test*%5Btitl%5D))%20OR%20(clinical%5Btitl%5D%20AND%20((expert%5Btitl%5D%20AND%20consensus%5Btitl%5D)%20OR%20utility%5Btitl%5D%20OR%20guideline*%5Btitl%5D))%20OR%20(management%5Btitl%5D%20AND%20(clinical%5Btitl%5D%20OR%20diagnos*%5Btitl%5D%20OR%20recommendation%5Btitl%5D%20OR%20pain%5Btitl%5D%20OR%20surveillance%5Btitl%5D%20OR%20emergency%5Btitl%5D%20OR%20guideline*%5Btitl%5D%20OR%20therap*))%20OR%20(treatment%5Btitl%5D%20AND%20((evaluation%5Btitl%5D%20AND%20diagnosis%5Btitl%5D)%20OR%20(assessment%5Btitl%5D%20AND%20prevention%5Btitl%5D)%20OR%20therap*))%20OR%20(Diagnos*%5Btitl%5D%20AND%20(prenatal%5Btitl%5D%20OR%20treatment%5Btitl%5D%20OR%20follow-up%5Btitl%5D%20OR%20statement%5Btitl%5D%20OR%20criteria%5Btitl%5D%20OR%20newborn%5Btitl%5D%20OR%20differential%5Btitl%5D%20OR%20neonatal%5Btitl%5D%20OR%20neonate%5Btitl%5D))%20OR%20(guideline*%5Btitl%5D%20AND%20(pharmacogenetic*%5Btitl%5D%20OR%20recommendation%5Btitl%5D%20OR%20therap*%5Btitl%5D%20OR%20evidence-based%5Btitl%5D%20OR%20consensus%5Btitl%5D%20OR%20(technical%5Btitl%5D%20AND%20standard*%5Btitl%5D)%20OR%20(molecular%5Btitl%5D%20AND%20testing%5Btitl%5D)))%20OR%20(risk%5Btitl%5D%20AND%20assessment%5Btitl%5D)%20OR%20(recommendation*%5Btitl%5D%20AND%20(statement%5Btitl%5D%20OR%20Evidence-based%5Btitl%5D%20OR%20Consensus%5Btitl%5D))%20OR%20(care%20AND%20((Patient%5Btitl%5D%20AND%20standard*%5Btitl%5D)%20OR%20primary%5Btitl%5D%20OR%20psychosocial%5Btitl%5D))%20OR%20(Health%5Btitl%5D%20AND%20supervision%5Btitl%5D)%20OR%20(statement%5Btitl%5D%20AND%20(policy%5Btitl%5D%20OR%20position%5Btitl%5D%20OR%20Consensus%5Btitl%5D))%20OR%20(pharmacogenetics%5Btitl%5D%20AND%20(Dosing%5Btitl%5D%20OR%20therap*%5Btitl%5D%20OR%20genotype*%5Btitl%5D%20OR%20drug*%5Btitl%5D))%20OR%20(Chemotherapy%5Btitl%5D%20AND%20decision*%5Btitl%5D)%20OR%20(screening%5Btitl%5D%20AND%20(newborn%5Btitl%5D%20OR%20neonat*%5Btitl%5D%20OR%20detection%5Btitl%5D%20OR%20diagnos*%5Btitl%5D))%20OR%20(criteria%5Btitl%5D%20OR%20genotype*%5Btitl%5D)%20)%20NOT%20(%22Case%20reports%22%5BPublication%20type%5D%20OR%20%22clinical%20study%22%5BPublication%20Type%5D%20OR%20%22randomized%20controlled%20trial%22%5BPublication%20Type%5D)" title="PubMed search">PubMed</a><div class="help-popup">See practice and clinical guidelines in PubMed. The search results may include broader topics and may not capture all published guidelines. See the <a href="/medgen/docs/faq/" title="Frequently asked questions" target="_blank">FAQ</a> for details.</div></li></ul></div>
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<div class="portlet_content ln"><ul><li><a href="http://www.diseaseinfosearch.org/Osteopetrosis+autosomal+recessive+4/5480" target="_blank">Genetic Alliance</a></li><li><a href="https://www.malacards.org/card/osteopetrosis_autosomal_recessive_4_2" target="_blank">MalaCards</a></li><li><a href="https://vsearch.nlm.nih.gov/vivisimo/cgi-bin/query-meta?v:project=medlineplus&amp;query=Autosomal%20recessive%20osteopetrosis%204" target="_blank">MedlinePlus</a></li><li><a href="https://medlineplus.gov/genetics/condition/osteopetrosis" target="_blank">MedlinePlusGenetics (GHR)</a></li><li><a href="https://rarediseases.info.nih.gov/diseases/5993/disease" target="_blank">NCATS Office of Rare Diseases Research (GARD)</a></li></ul></div>
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