nih-gov/medlineplus.gov/genetics/condition/myhre-syndrome/index.html
2025-02-26 13:17:41 -05:00

776 lines
55 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<!DOCTYPE html>
<html lang="en" id="genetic_condition" class="nojs us" data-root="https://medlineplus.gov/">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<meta http-equiv="window-target" content="_top" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="canonical" href="https://medlineplus.gov/genetics/condition/myhre-syndrome/" />
<link href="https://medlineplus.gov/genetics/condition/myhre-syndrome/" hreflang="x-default" rel="alternate">
<meta name="ac-dictionary" content="medlineplus-ac-dictionary" />
<meta name="description" content="Myhre syndrome is a rare condition that affects connective tissue . Explore symptoms, inheritance, genetics of this condition." />
<link rel="shortcut icon" href="https://medlineplus.gov/images/favicon.ico" type="image/x-icon" />
<link rel="apple-touch-icon" href="https://medlineplus.gov/images/touch-icon.png" />
<meta property="fb:app_id" content="1042245625821448" />
<meta property="og:title" content="Myhre syndrome: MedlinePlus Genetics" />
<meta property="og:url" content="https://medlineplus.gov/genetics/condition/myhre-syndrome/" />
<meta property="og:image" content="https://medlineplus.gov/images/GeneticCondition_Share.jpg" />
<meta property="og:description" content="Myhre syndrome is a rare condition that affects connective tissue . Explore symptoms, inheritance, genetics of this condition." />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:site" content="@medlineplus" />
<meta name="twitter:creator" content="@medlineplus" />
<meta name="twitter:title" content="Myhre syndrome: MedlinePlus Genetics" />
<meta name="twitter:description" content="Myhre syndrome is a rare condition that affects connective tissue . Explore symptoms, inheritance, genetics of this condition." />
<meta name="twitter:image" content="https://medlineplus.gov/images/GeneticCondition_Share.jpg" />
<meta name="twitter:image:alt" content=""/>
<meta property="og:image:alt" content="" />
<title>Myhre syndrome: MedlinePlus Genetics</title>
<link rel="stylesheet" href="https://medlineplus.gov/css/common_new.css?1738956969002" />
<!--[if IE 8]> <link rel="stylesheet" href="https://medlineplus.gov/css/ie8/common.css"> <![endif]-->
<link rel="stylesheet" href="https://medlineplus.gov/uswds/css/uswds_styles.css" />
<script type="text/javascript">document.getElementsByTagName('html')[0].className = document.getElementsByTagName('html')[0].className.replace( /(?:^|\s)nojs(?!\S)/g , '').trim();</script>
<script src="https://medlineplus.gov/uswds/js/uswds-init.min.js" type="text/javascript"></script>
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-MMVM77');</script>
</head>
<body>
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-MMVM77"
height="0" width="0" style="display:none;visibility:hidden" title="googletagmanager"></iframe></noscript>
<a name="top" id="top"></a>
<a class="hide-offscreen" href="#start">Skip navigation</a>
<section
class="usa-banner"
aria-label="Official website of the United States government"
>
<div class="usa-accordion">
<header class="usa-banner__header">
<div class="usa-banner__inner">
<div class="grid-col-auto">
<img
aria-hidden="true"
class="usa-banner__header-flag"
src="https://medlineplus.gov/uswds/img/us_flag_small.png"
alt=""
/>
</div>
<div class="grid-col-fill tablet:grid-col-auto" aria-hidden="true">
<p class="usa-banner__header-text">
An official website of the United States government
</p>
<p class="usa-banner__header-action">Heres how you know</p>
</div>
<button
type="button"
class="usa-accordion__button usa-banner__button"
aria-expanded="false"
aria-controls="gov-banner-default-default"
>
<span class="usa-banner__button-text">Heres how you know</span>
</button>
</div>
</header>
<div
class="usa-banner__content usa-accordion__content"
id="gov-banner-default-default"
>
<div class="grid-row grid-gap-lg">
<div class="usa-banner__guidance tablet:grid-col-6">
<img
class="usa-banner__icon usa-media-block__img"
src="https://medlineplus.gov/uswds/img/icon-dot-gov.svg"
role="img"
alt=""
aria-hidden="true"
/>
<div class="usa-media-block__body">
<p>
<strong>Official websites use .gov</strong><br />A
<strong>.gov</strong> website belongs to an official government
organization in the United States.
</p>
</div>
</div>
<div class="usa-banner__guidance tablet:grid-col-6">
<img
class="usa-banner__icon usa-media-block__img"
src="https://medlineplus.gov/uswds/img/icon-https.svg"
role="img"
alt=""
aria-hidden="true"
/>
<div class="usa-media-block__body">
<p>
<strong>Secure .gov websites use HTTPS</strong><br />A
<strong>lock</strong> (
<span class="icon-lock"
><svg
xmlns="http://www.w3.org/2000/svg"
width="52"
height="64"
viewBox="0 0 52 64"
class="usa-banner__lock-image"
role="img"
aria-labelledby="banner-lock-description-default"
focusable="false"
>
<title id="banner-lock-title-default">Lock</title>
<desc id="banner-lock-description-default">Locked padlock icon</desc>
<path
fill="#000000"
fill-rule="evenodd"
d="M26 0c10.493 0 19 8.507 19 19v9h3a4 4 0 0 1 4 4v28a4 4 0 0 1-4 4H4a4 4 0 0 1-4-4V32a4 4 0 0 1 4-4h3v-9C7 8.507 15.507 0 26 0zm0 8c-5.979 0-10.843 4.77-10.996 10.712L15 19v9h22v-9c0-6.075-4.925-11-11-11z"
/>
</svg> </span
>) or <strong>https://</strong> means youve safely connected to
the .gov website. Share sensitive information only on official,
secure websites.
</p>
</div>
</div>
</div>
</div>
</div>
</section>
<div id="mplus-wrap">
<header>
<div id="mplus-header">
<div id="mplus-orgs">
<a href="https://www.nih.gov/" class="nih-org" target="_blank" title="National Institutes of Health">
<img class="nihlogo" src="https://medlineplus.gov/images/nihlogo.png" alt="National Institutes of Health"/>
</a><a href="https://www.nlm.nih.gov/" target="_blank"> National Library of Medicine</a>
</div>
<div id="mplus-logo" class="years-25">
<a href="https://medlineplus.gov/">
<img alt="MedlinePlus Trusted Health Information for You" title="MedlinePlus Trusted Health Information for You" src="https://medlineplus.gov/images/m_logo_25.png"/>
</a>
</div>
<div id="mplus-nav">
<div aria-live="polite" class="sm-live-area hide-offscreen"></div>
<button id="sm-menu-btn" class="navmenu-btn" title="Menu" role="button" aria-controls="mplus-menu-list" type="submit">Menu<span class="icon icon-nav-menu"></span></button>
<ul id="mplus-menu-list" class="nav-list">
<li><a href="https://medlineplus.gov/healthtopics.html">Health Topics</a></li>
<li><a href="https://medlineplus.gov/druginformation.html">Drugs & Supplements</a></li>
<li><a href="https://medlineplus.gov/genetics/">Genetics</a></li>
<li><a href="https://medlineplus.gov/lab-tests/">Medical Tests</a></li>
<li><a href="https://medlineplus.gov/encyclopedia.html">Medical Encyclopedia</a></li>
<li><a href="https://medlineplus.gov/about/">About MedlinePlus</a></li>
</ul><button id="sm-search-btn" class="navmenu-btn" title="Search" role="button" aria-controls="mplus-search" type="submit"><span class="hide-offscreen"></span>Search<span class="icon icon-nav-search"></span></button>
<div class="top-1">
<form id="mplus-search" method="get" action="https://vsearch.nlm.nih.gov/vivisimo/cgi-bin/query-meta" title="Search MedlinePlus" target="_self">
<input type="hidden" name="v:project" value="medlineplus"/>
<input type="hidden" name="v:sources" value="medlineplus-bundle"/>
<div class="form-box text-combo">
<div class="form-area"><label class="hide-offscreen" for="searchtext_primary">Search MedlinePlus</label>
<input id="searchtext_primary" class="form-text" type="text" placeholder="Search MedlinePlus" alt="#Site Search input" title="Site Search input" maxlength="400" size="40" name="query" autocomplete="off" role="textbox" aria-autocomplete="list" aria-haspopup="true"/>
</div>
<div class="button-area">
<button class="form-btn" title="Search MedlinePlus" alt="Search MedlinePlus" type="submit">GO</button>
</div>
</div>
</form>
<div class="secondarynav">
<ul class="nav-list">
<li><a href="https://medlineplus.gov/about/"><span>About MedlinePlus</span></a></li>
<li><a href="https://medlineplus.gov/whatsnew/">What's New</a></li>
<li><a href="https://medlineplus.gov/sitemap.html"><span>Site Map</span></a></li>
<li><a href="https://support.nlm.nih.gov/knowledgebase/category/?id=CAT-01231&category=medlineplus&from=https%3A//medlineplus.gov/genetics/condition/myhre-syndrome/" target="_blank"><span>Customer Support</span></a></li>
</ul>
</div>
</div>
<div id="mplus-nav-bar">
<ul class="nav-list">
<li><a href="https://medlineplus.gov/healthtopics.html">Health Topics</a></li><li><a href="https://medlineplus.gov/druginformation.html">Drugs & Supplements</a></li><li><a href="https://medlineplus.gov/genetics/">Genetics</a></li><li><a href="https://medlineplus.gov/lab-tests/">Medical Tests</a></li><li><a href="https://medlineplus.gov/encyclopedia.html">Medical Encyclopedia</a></li>
</ul>
</div>
</div>
</div>
</header>
<div id="mplus-content">
<div id="breadcrumbs">
<div itemprop="breadcrumb" itemscope="" itemtype="http://schema.org/BreadcrumbList">
<span class="hide-offscreen">You Are Here:</span>
<div itemscope itemprop="itemListElement" itemtype="http://schema.org/ListItem">
<a href="https://medlineplus.gov/" itemprop="item"><span itemprop="name">Home</span></a>
&rarr;
<meta itemprop="position" content="1"/>
</div>
<div itemscope itemprop="itemListElement" itemtype="http://schema.org/ListItem">
<a href="https://medlineplus.gov/genetics/" itemprop="item"><span itemprop="name">Genetics</span></a>
&rarr;
<meta itemprop="position" content="2"/>
</div>
<div itemscope itemprop="itemListElement" itemtype="http://schema.org/ListItem">
<a href="https://medlineplus.gov/genetics/condition/" itemprop="item"><span itemprop="name">Genetic Conditions</span></a>
&rarr;
<meta itemprop="position" content="3"/>
</div>
<div>
<span>Myhre syndrome</span>
</div>
</div>
</div>
<span class="page-url print-only">URL of this page: https://medlineplus.gov/genetics/condition/myhre-syndrome/</span>
<div >
<article>
<div class="page-info">
<div class="page-title">
<a name="start" id="start"></a>
<h1>Myhre syndrome</h1>
</div>
<div class="page-actions"></div>
<noscript><span class="js-disabled-message">To use the sharing features on this page, please enable JavaScript.</span></noscript>
</div>
<div class="main">
<div class="mp-exp exp-full" data-bookmark="description">
<h2>Description</h2>
<section><div class="mp-content"><p>Myhre syndrome is a rare condition that affects <a class="image-modal" data-alt="Components of connective tissue, labelled, including collagen fibers, elastic fibers, reticular fibers, capillaries, fat cells and other cell types." data-caption="" data-credit="Designua/Shutterstock.com" data-filepath="images/PX0000S4_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0000S4" data-sourceurl="" data-title="Connective tissues" href="https://medlineplus.gov/images/PX0000S4_PRESENTATION.jpeg" id="PX0000S4_1" title="Show image">connective tissue<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>. Connective tissue provides strength and flexibility to structures throughout the body. Myhre syndrome has a variety of signs and symptoms that affect many parts of the body, though not everyone has all the possible features. The features of the condition can range in severity, and some features become more apparent with age.</p><p>Common signs and symptoms of Myhre syndrome include short stature, skeletal abnormalities, limited joint mobility, characteristic facial features, intellectual and behavioral problems, hearing loss, a tendency for the buildup of scar tissue (fibrosis) in the skin and internal organs, and <a class="image-modal" data-alt="A cross-section of various structures that make up the normal heart." data-caption="" data-credit="U.S. National Library of Medicine" data-filepath="images/PX0002LE_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0002LE" data-sourceurl="https://www.nlm.nih.gov/" data-title="Normal heart anatomy" href="https://medlineplus.gov/images/PX0002LE_PRESENTATION.jpeg" id="PX0002LE_2" title="Show image">heart<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a> and lung abnormalities.</p><p>Growth is reduced in most people with Myhre syndrome, beginning before birth and continuing through adolescence. Affected individuals usually have a low birth weight and are generally shorter than about 97 percent of their peers throughout life. They have shortened long bones of the arms and legs, unusually short fingers and toes (<a class="image-modal" data-alt="Photograph of a person's foot showing their short toes." data-caption="" data-credit="Elements of Morphology, National Human Genome Research Institute" data-filepath="images/PX0002AY_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0002AY" data-sourceurl="https://elementsofmorphology.nih.gov/index.cgi?tid=990cccce54c6f32e" data-title="Short toes (brachydactyly of the foot)" href="https://medlineplus.gov/images/PX0002AY_PRESENTATION.jpeg" id="PX0002AY_3" title="Show image">brachydactyly<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>), and curved pinky fingers (fifth finger <a class="image-modal" data-alt="Photograph of a person's hands with clinodactyly on both hands." data-caption="Clinodactyly, bilateral." data-credit="Elements of Morphology, National Human Genome Research Institute" data-filepath="images/PX00029F_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX00029F" data-sourceurl="https://elementsofmorphology.nih.gov/index.cgi?tid=483af428f909c76c" data-title="Clinodactyly" href="https://medlineplus.gov/images/PX00029F_PRESENTATION.jpeg" id="PX00029F_4" title="Show image">clinodactyly<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>). Other skeletal abnormalities associated with this disorder include thickening of the skull bones, flattened bones of the spine (platyspondyly), broad ribs, and underdevelopment of the wing-shaped structures of the pelvis (hypoplastic iliac wings). Affected individuals often have joint problems (arthropathy), including stiffness and limited mobility.</p><p>Typical facial features in people with Myhre syndrome include narrow openings of the eyelids (<a class="image-modal" data-alt="Photograph of a child's face, showing eyes with short palpebral fissures." data-caption="Young female with mildly to moderately short palpebral fissures." data-credit="Elements of Morphology, National Human Genome Research Institute" data-filepath="images/PX0001T4_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0001T4" data-sourceurl="https://elementsofmorphology.nih.gov/index.cgi?tid=8ea165ff88fe04c3" data-title="Short palpebral fissures" href="https://medlineplus.gov/images/PX0001T4_PRESENTATION.jpeg" id="PX0001T4_5" title="Show image">short palpebral fissures<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>), deeply set eyes, a shortened distance between the nose and upper lip (a short philtrum), a <a class="image-modal" data-alt="Photograph of a baby's narrow mouth." data-caption="" data-credit="Elements of Morphology, National Human Genome Research Institute" data-filepath="images/PX00024B_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX00024B" data-sourceurl="https://elementsofmorphology.nih.gov/index.cgi?tid=dbaf4cd806daeacb" data-title="Narrow mouth (microstomia)" href="https://medlineplus.gov/images/PX00024B_PRESENTATION.jpeg" id="PX00024B_6" title="Show image">narrow mouth<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a> with a <a class="image-modal" data-alt="Photograph of a child's mouth showing a thin upper lip." data-caption="" data-credit="Elements of Morphology, National Human Genome Research Institute" data-filepath="images/PX00022Z_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX00022Z" data-sourceurl="https://elementsofmorphology.nih.gov/index.cgi?tid=a5293d97f7bfc31c" data-title="Thin upper lip" href="https://medlineplus.gov/images/PX00022Z_PRESENTATION.jpeg" id="PX00022Z_7" title="Show image">thin upper lip<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>, an underdeveloped upper jaw, and a protruding lower jaw (<a class="image-modal" data-alt="Photograph of the side view of the face of a person with prognathism." data-caption="There is anterior protrusion of the mandible such that the alveolar ridge extends beyond the vertical plane of the maxillary alveolar ridge." data-credit="Elements of Morphology, National Human Genome Research Institute" data-filepath="images/PX0001LI_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0001LI" data-sourceurl="https://elementsofmorphology.nih.gov/index.cgi?tid=cf3eb35245d52feb" data-title="Prognathism" href="https://medlineplus.gov/images/PX0001LI_PRESENTATION.jpeg" id="PX0001LI_8" title="Show image">prognathism<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>). Some affected individuals are born with an opening in the roof of the mouth (a <a class="image-modal" data-alt="Baby with an opening in the roof of the mouth; inset shows greater detail." data-caption="" data-credit="Centers for Disease Control and Prevention" data-filepath="images/PX0000FG_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0000FG" data-sourceurl="https://www.cdc.gov/birth-defects/about/cleft-lip-cleft-palate.html" data-title="Baby with cleft palate" href="https://medlineplus.gov/images/PX0000FG_PRESENTATION.jpeg" id="PX0000FG_9" title="Show image">cleft palate<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>), a split in the lip (a <a class="image-modal" data-alt="Baby with an opening between the upper lip and the nose." data-caption="" data-credit="Centers for Disease Control and Prevention" data-filepath="images/PX0000FK_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0000FK" data-sourceurl="https://www.cdc.gov/birth-defects/about/cleft-lip-cleft-palate.html" data-title="Baby with cleft lip" href="https://medlineplus.gov/images/PX0000FK_PRESENTATION.jpeg" id="PX0000FK_10" title="Show image">cleft lip<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>), or both. <a class="image-modal" data-alt="In normal vision, light is focused at a single point on the back of the eye. In myopia, the light is focused in front of the back of the eye. In hyperopia, the light is focused beyond the back of the eye. And in astigmatism, the light is focused at multiple points on the back of the eye." data-caption="" data-credit="Tefi/Shutterstock.com" data-filepath="images/PX0000Q0_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0000Q0" data-sourceurl="" data-title="Vision disorders: astigmatism, hyperopia, and myopia" href="https://medlineplus.gov/images/PX0000Q0_PRESENTATION.jpeg" id="PX0000Q0_11" title="Show image">Vision problems<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a> are common in this disorder and can include eyes that do not point in the same direction (strabismus), <a data-pid="16905" href="https://medlineplus.gov/genetics/condition/nearsightedness/">nearsightedness</a> (<a class="image-modal" data-alt="Diagram of light entering an eye with myopia." data-caption="" data-credit="National Eye Institute/National Institutes of Health" data-filepath="images/PX00000O_PRESENTATION.png" data-imgtype="genetics" data-pix="PX00000O" data-sourceurl="https://www.flickr.com/photos/nationaleyeinstitute/" data-title="Myopia (nearsightedness)" href="https://medlineplus.gov/images/PX00000O_PRESENTATION.png" id="PX00000O_13" title="Show image">myopia<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>), <a data-pid="16909" href="https://medlineplus.gov/genetics/condition/farsightedness/">farsightedness</a> (<a class="image-modal" data-alt="Diagram of light entering an eye with hyperopia." data-caption="" data-credit="National Eye Institute/National Institutes of Health" data-filepath="images/PX00000W_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX00000W" data-sourceurl="https://www.flickr.com/photos/nationaleyeinstitute/" data-title="Hyperopia (farsightedness)" href="https://medlineplus.gov/images/PX00000W_PRESENTATION.jpeg" id="PX00000W_15" title="Show image">hyperopia<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>), an irregular curvature of the front of the eye (astigmatism), clouding of the lenses (<a class="image-modal" data-alt="Drawing of a healthy eye with a clear lens compared to an eye with a lens clouded by cataract." data-caption="" data-credit="Designua/Shutterstock.com" data-filepath="images/PX0000US_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0000US" data-sourceurl="" data-title="Healthy eye and eye with cataract" href="https://medlineplus.gov/images/PX0000US_PRESENTATION.jpeg" id="PX0000US_16" title="Show image">cataracts<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>), or rarely, an abnormality of the back of the eye called pseudopapilledema.</p><p>Children with Myhre syndrome have delayed development, which is noticeable by age 5. Speech and language delay are the most significant. Motor skills such as crawling and walking may be delayed, although children with Myhre syndrome eventually learn to walk. Most affected individuals have intellectual disability that ranges from mild to moderate, yet some are able to have jobs or pursue higher education.</p><p>People with Myhre syndrome typically have features like those in <a data-pid="16743" href="https://medlineplus.gov/genetics/condition/autism-spectrum-disorder/">autism spectrum disorder</a>, which affects communication and social interaction. These problems vary in severity, and they usually improve over time.</p><p>Hearing loss occurs in most people with Myhre syndrome, usually beginning in childhood and gradually worsening. If not detected promptly, hearing problems can contribute to learning and behavioral problems.</p><p>Fibrosis in Myhre syndrome can occur in the absence of injury (spontaneously) or develop following surgery or trauma. Affected individuals typically have stiff, thickened skin, usually beginning in childhood. Typically, the skin changes first appear on the palms of the hands, the soles of the feet, the back of the elbows, and the front of the knees. Eventually the skin thickens on other parts of the body. As a result of the thicker skin, affected individuals typically have fewer facial creases (wrinkles) than others of their age. Scars may be more noticeable or become unusually thickened after healing (keloids or hypertrophic scars).</p><p>Individuals with Myhre syndrome often have problems with the structure of the heart that are present at birth (congenital heart defects). Fibrosis in the heart and blood vessels (cardiovascular system) can lead to the development of additional problems such as high blood pressure (<a data-pid="16961" href="https://medlineplus.gov/genetics/condition/hypertension/">hypertension</a>) and narrowing (stenosis) of the heart valves or blood vessels. Other cardiovascular problems can include swelling and tightening of the <a class="image-modal" data-alt="The pericardium is the sac surrounding the heart; inset shows the layers of the pericardium." data-caption="" data-credit="U.S. National Library of Medicine" data-filepath="images/PX0002LY_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0002LY" data-sourceurl="https://www.nlm.nih.gov/" data-title="Pericardium" href="https://medlineplus.gov/images/PX0002LY_PRESENTATION.jpeg" id="PX0002LY_19" title="Show image">pericardium<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>, which is the membrane that surrounds the heart (pericarditis), and rarely, restrictive cardiomyopathy, in which the heart muscle is stiff and cannot fully relax after each contraction. These cardiovascular problems can be life-threatening.</p><p>Abnormalities of the lungs and airways (<a class="image-modal" data-alt="Anatomy of the respiratory system, showing the trachea and both lungs and their lobes and airways. Lymph nodes and the diaphragm are also shown." data-caption="Anatomy of the respiratory system, showing the trachea and both lungs and their lobes and airways. Lymph nodes and the diaphragm are also shown. Oxygen is inhaled into the lungs and passes through the thin membranes of the alveoli and into the bloodstream (see inset)." data-credit="© 2006 Terese Winslow LLC for the National Cancer Institute" data-filepath="images/PX00024F_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX00024F" data-sourceurl="https://visualsonline.cancer.gov/details.cfm?imageid=7235" data-title="Respiratory system" href="https://medlineplus.gov/images/PX00024F_PRESENTATION.jpeg" id="PX00024F_20" title="Show image">respiratory tract<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>) in people with Myhre syndrome include narrowing of the windpipe (laryngotracheal stenosis) and the passages leading from the windpipe to the lungs (bronchi); difficulty filling the lungs with air when inhaling (restrictive pulmonary disease); or widespread lung damage (interstitial lung disease). These respiratory tract problems can be life-threatening.</p><p>Additional features of Myhre syndrome include problems in the gastrointestinal tract, such as narrowing of the lower part of the <a class="image-modal" data-alt="The esophagus and stomach are part of the upper gastrointestinal (digestive) system." data-caption="The esophagus and stomach are part of the upper gastrointestinal (digestive) system." data-credit="© 2005 Terese Winslow LLC for the National Cancer Institute" data-filepath="images/PX000263_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX000263" data-sourceurl="https://visualsonline.cancer.gov/details.cfm?imageid=7206" data-title="Upper gastrointestinal tract" href="https://medlineplus.gov/images/PX000263_PRESENTATION.jpeg" id="PX000263_21" title="Show image">stomach<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a> (pyloric stenosis) or of the upper part of the <a class="image-modal" data-alt="Anatomy of the lower digestive system, showing the colon, small intestine, rectum, and other organs." data-caption="Anatomy of the lower digestive system, showing the colon and other organs." data-credit="© 2011 Terese Winslow LLC for the National Cancer Institute" data-filepath="images/PX0001VQ_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0001VQ" data-sourceurl="https://visualsonline.cancer.gov/details.cfm?imageid=7179" data-title="Lower gastrointestinal tract" href="https://medlineplus.gov/images/PX0001VQ_PRESENTATION.jpeg" id="PX0001VQ_22" title="Show image">small intestine<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a> (duodenal strictures) and severe constipation. People with Myhre syndrome also may have an increased risk of developing cancerous or noncancerous tumors, including cancer of the <a class="image-modal" data-alt="Diagram of the female reproductive system, including the uterus, ovaries, fallopian tubes, and other major structures." data-caption="" data-credit="NIH Medical Arts/National Cancer Institute" data-filepath="images/PX000038_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX000038" data-sourceurl="https://visualsonline.cancer.gov/details.cfm?imageid=4369" data-title="Female reproductive system" href="https://medlineplus.gov/images/PX000038_PRESENTATION.jpeg" id="PX000038_23" title="Show image">lining of the uterus<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a> (endometrial cancer).</p></div>
</section>
</div>
<div class="mp-exp exp-full" data-bookmark="frequency">
<h2>Frequency</h2>
<section><div class="mp-content"><p>Myhre syndrome is a rare disorder; its prevalence is unknown. Almost 100 cases have been documented in the medical literature.</p></div>
</section>
</div>
<div class="mp-exp exp-full" data-bookmark="causes">
<h2>Causes</h2>
<section><div class="mp-content"><p>Mutations in the <i><a data-pid="17501" href="https://medlineplus.gov/genetics/gene/smad4/">SMAD4</a></i> gene cause Myhre syndrome. The <i>SMAD4</i> gene provides instructions for making a protein involved in transmitting chemical signals from the cell surface to the <a class="image-modal" data-alt="The nucleus is the central structure in a cell." data-caption="" data-credit="Biblioteca Nacional de Medicina de los EE. UU." data-filepath="images/PX00007C_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX00007C" data-sourceurl="" data-title="Nucleus" href="https://medlineplus.gov/images/PX00007C_PRESENTATION.jpeg" id="PX00007C_2" title="Show image">nucleus<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>. This signaling pathway, called the transforming growth factor beta (TGF-β) pathway, allows the environment outside the cell to affect gene activity and protein production within the cell. As part of this pathway, the SMAD4 protein interacts with other proteins to control the activity of particular genes. These genes influence the development of many body systems.</p><p>Studies suggest that the <i>SMAD4</i> gene mutations that cause Myhre syndrome result in an abnormally stable SMAD4 protein that remains active in the cell longer than it is needed. Increased SMAD4 availability allows the protein more time to interact with other proteins and may result in abnormal TGF-β signaling in many cell types, which affects development of several body systems and leads to the signs and symptoms of Myhre syndrome.</p></div>
</section>
<section>
<div class="related-genes mp-exp exp-full">
<h3>Learn more about the gene associated with Myhre syndrome</h3>
<ul class="relatedmp">
<li><a href="https://medlineplus.gov/genetics/gene/smad4/">SMAD4</a></li>
</ul>
</div>
</section>
</div>
<div class="mp-exp exp-full" data-bookmark="inheritance">
<h2>Inheritance</h2>
<section><div class="mp- mp-content"><p>Myhre syndrome is inherited in an autosomal dominant pattern, which means one copy of the altered <i><a data-pid="17501" href="https://medlineplus.gov/genetics/gene/smad4/">SMAD4</a></i> gene in each cell is sufficient to cause the disorder.</p><p>In almost all cases, the condition results from <a class="image-modal" data-alt="Neither parent has the mutated gene. A spontaneous mutation occurs during the formation of an egg or sperm cell during embryonic development, leading to an affected child." data-caption="
" data-credit="U.S. National Library of Medicine" data-filepath="images/PX0000A8_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX0000A8" data-sourceurl="" data-title="Autosomal dominant inheritance with a new (de novo) mutation" href="https://medlineplus.gov/images/PX0000A8_PRESENTATION.jpeg" id="PX0000A8_2" title="Show image">new mutations in the gene<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a> and occurs in people with no history of the disorder in their family. Rarely, an affected person inherits the mutation from <a class="image-modal" data-alt="A parent with an autosomal dominant condition passes the altered gene to two affected children. Two other children do not receive the altered gene, and are unaffected." data-caption="" data-credit="U.S. National Library of Medicine" data-filepath="images/PX00009C_PRESENTATION.jpeg" data-imgtype="genetics" data-pix="PX00009C" data-sourceurl="" data-title="Autosomal dominant inheritance" href="https://medlineplus.gov/images/PX00009C_PRESENTATION.jpeg" id="PX00009C_3" title="Show image">one affected parent<img alt="" aria-hidden="true" class="image-modal-icon" src="https://medlineplus.gov/css/img/icon_camera_small.png"/></a>.</p></div>
</section>
</div>
<div class="mp-exp exp-full" data-bookmark="synonyms">
<h2>Other Names for This Condition</h2>
<section>
<ul class="bulletlist">
<li>LAPS syndrome</li> <li>Laryngotracheal stenosis, arthropathy, prognathism, and short stature</li>
</ul>
</section>
</div>
<div class="mp-exp exp-full" data-bookmark="resources">
<h2>Additional Information & Resources</h2>
<section>
<div class="mp-content">
<h2>Genetic Testing Information</h2>
<ul>
<li><a href="https://www.ncbi.nlm.nih.gov/gtr/conditions/C0796081/" target="TheNewWin">Genetic Testing Registry: Myhre syndrome</a> <span class="desc-text"><img alt="From the National Institutes of Health" title="From the National Institutes of Health" src="https://medlineplus.gov/images/nih.png" class="imgdesc" width="25" height="16"></span></li>
</ul>
</div>
</section>
<section>
<div class="mp-content">
<h2>Genetic and Rare Diseases Information Center</h2>
<ul>
<li><a href="https://rarediseases.info.nih.gov/diseases/2572/index" target="TheNewWin">Myhre syndrome</a> <span class="desc-text"><img alt="From the National Institutes of Health" title="From the National Institutes of Health" src="https://medlineplus.gov/images/nih.png" class="imgdesc" width="25" height="16"></span></li>
</ul>
</div>
</section>
<section>
<div class="mp-content">
<h2>Patient Support and Advocacy Resources</h2>
<ul>
<li><a href="https://rarediseases.org/" target="TheNewWin">National Organization for Rare Disorders (NORD)</a></li>
</ul>
</div>
</section>
<section>
<div class="mp-content">
<h2>Clinical Trials</h2>
<ul>
<li><a href="https://clinicaltrials.gov/search?cond=%22Myhre syndrome%22" target="TheNewWin">ClinicalTrials.gov</a> <span class="desc-text"><img alt="From the National Institutes of Health" title="From the National Institutes of Health" src="https://medlineplus.gov/images/nih.png" class="imgdesc" width="25" height="16"></span></li>
</ul>
</div>
</section>
<section>
<div class="mp-content">
<h2>Catalog of Genes and Diseases from OMIM</h2>
<ul>
<li><a href="https://omim.org/entry/139210" target="TheNewWin">MYHRE SYNDROME; MYHRS</a></li>
</ul>
</div>
</section>
<section>
<div class="mp-content">
<h2>Scientific Articles on PubMed</h2>
<ul>
<li><a href="https://pubmed.ncbi.nlm.nih.gov/?term=%28%28myhre+syndrome%5BTIAB%5D%29+OR+%28laps+syndrome%5BTIAB%5D%29%29+AND+english%5Bla%5D+AND+%22last+3600+days%22%5Bdp%5D" target="TheNewWin">PubMed</a> <span class="desc-text"><img alt="From the National Institutes of Health" title="From the National Institutes of Health" src="https://medlineplus.gov/images/nih.png" class="imgdesc" width="25" height="16"></span></li>
</ul>
</div>
</section>
</div>
<div class="mp-exp exp-full" data-bookmark="references">
<h2>References</h2>
<section>
<div class="mp-content">
<ul>
<li>Caputo V, Bocchinfuso G, Castori M, Traversa A, Pizzuti A, Stella L,
Grammatico P, Tartaglia M. Novel SMAD4 mutation causing Myhre syndrome. Am J Med
Genet A. 2014 Jul;164A(7):1835-40. doi: 10.1002/ajmg.a.36544. Epub 2014 Apr 8.
<a href="https://pubmed.ncbi.nlm.nih.gov/24715504" target="TheNewWin">Citation on PubMed</a></li>
<li>Caputo V, Cianetti L, Niceta M, Carta C, Ciolfi A, Bocchinfuso G, Carrani E,
Dentici ML, Biamino E, Belligni E, Garavelli L, Boccone L, Melis D, Andria G,
Gelb BD, Stella L, Silengo M, Dallapiccola B, Tartaglia M. A restricted spectrum
of mutations in the SMAD4 tumor-suppressor gene underlies Myhre syndrome. Am J
Hum Genet. 2012 Jan 13;90(1):161-9. doi: 10.1016/j.ajhg.2011.12.011. <a href="https://pubmed.ncbi.nlm.nih.gov/22243968" target="TheNewWin">Citation on PubMed</a> or <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3257749/" target="TheNewWin">Free article on PubMed Central</a></li>
<li>Garavelli L, Maini I, Baccilieri F, Ivanovski I, Pollazzon M, Rosato S,
Iughetti L, Unger S, Superti-Furga A, Tartaglia M. Natural history and
life-threatening complications in Myhre syndrome and review of the literature.
Eur J Pediatr. 2016 Oct;175(10):1307-15. doi: 10.1007/s00431-016-2761-3. Epub
2016 Aug 25. <a href="https://pubmed.ncbi.nlm.nih.gov/27562837" target="TheNewWin">Citation on PubMed</a></li>
<li>Le Goff C, Mahaut C, Abhyankar A, Le Goff W, Serre V, Afenjar A, Destree A, di
Rocco M, Heron D, Jacquemont S, Marlin S, Simon M, Tolmie J, Verloes A, Casanova
JL, Munnich A, Cormier-Daire V. Mutations at a single codon in Mad homology 2
domain of SMAD4 cause Myhre syndrome. Nat Genet. 2011 Dec 11;44(1):85-8. doi:
10.1038/ng.1016. <a href="https://pubmed.ncbi.nlm.nih.gov/22158539" target="TheNewWin">Citation on PubMed</a></li>
<li>Le Goff C, Michot C, Cormier-Daire V. Myhre syndrome. Clin Genet. 2014
Jun;85(6):503-13. doi: 10.1111/cge.12365. Epub 2014 Apr 2. <a href="https://pubmed.ncbi.nlm.nih.gov/24580733" target="TheNewWin">Citation on PubMed</a></li>
<li>Lin AE, Alali A, Starr LJ, Shah N, Beavis A, Pereira EM, Lindsay ME, Klugman
S. Gain-of-function pathogenic variants in SMAD4 are associated with neoplasia in
Myhre syndrome. Am J Med Genet A. 2020 Feb;182(2):328-337. doi:
10.1002/ajmg.a.61430. Epub 2019 Dec 14. Erratum In: Am J Med Genet A. 2024
Jun;194(6):e63497. doi: 10.1002/ajmg.a.63497. <a href="https://pubmed.ncbi.nlm.nih.gov/31837202" target="TheNewWin">Citation on PubMed</a></li>
<li>Lin AE, Brunetti-Pierri N, Lindsay ME, Schimmenti LA, Starr LJ. Myhre
Syndrome. 2017 Apr 13 [updated 2024 Dec 12]. In: Adam MP, Feldman J, Mirzaa GM,
Pagon RA, Wallace SE, Amemiya A, editors. GeneReviews(R) [Internet].
Seattle (WA): University of Washington, Seattle; 1993-2025. Available from
http://www.ncbi.nlm.nih.gov/books/NBK425723/
<a href="https://pubmed.ncbi.nlm.nih.gov/28406602" target="TheNewWin">Citation on PubMed</a></li>
<li>Lin AE, Michot C, Cormier-Daire V, L&#x27;Ecuyer TJ, Matherne GP, Barnes BH,
Humberson JB, Edmondson AC, Zackai E, O&#x27;Connor MJ, Kaplan JD, Ebeid MR, Krier J,
Krieg E, Ghoshhajra B, Lindsay ME. Gain-of-function mutations in SMAD4 cause a
distinctive repertoire of cardiovascular phenotypes in patients with Myhre
syndrome. Am J Med Genet A. 2016 Oct;170(10):2617-31. doi: 10.1002/ajmg.a.37739.
Epub 2016 Jun 14. <a href="https://pubmed.ncbi.nlm.nih.gov/27302097" target="TheNewWin">Citation on PubMed</a></li>
<li>Lindor NM, Gunawardena SR, Thibodeau SN. Mutations of SMAD4 account for both
LAPS and Myhre syndromes. Am J Med Genet A. 2012 Jun;158A(6):1520-1. doi:
10.1002/ajmg.a.35374. Epub 2012 May 14. No abstract available. <a href="https://pubmed.ncbi.nlm.nih.gov/22585601" target="TheNewWin">Citation on PubMed</a></li>
<li>McGowan R, Gulati R, McHenry P, Cooke A, Butler S, Keng WT, Murday V,
Whiteford M, Dikkers FG, Sikkema-Raddatz B, van Essen T, Tolmie J. Clinical
features and respiratory complications in Myhre syndrome. Eur J Med Genet. 2011
Nov-Dec;54(6):e553-9. doi: 10.1016/j.ejmg.2011.07.001. Epub 2011 Jul 21. <a href="https://pubmed.ncbi.nlm.nih.gov/21816239" target="TheNewWin">Citation on PubMed</a></li>
<li>Meerschaut I, Beyens A, Steyaert W, De Rycke R, Bonte K, De Backer T, Janssens
S, Panzer J, Plasschaert F, De Wolf D, Callewaert B. Myhre syndrome: A first
familial recurrence and broadening of the phenotypic spectrum. Am J Med Genet A.
2019 Dec;179(12):2494-2499. doi: 10.1002/ajmg.a.61377. Epub 2019 Oct 9. <a href="https://pubmed.ncbi.nlm.nih.gov/31595668" target="TheNewWin">Citation on PubMed</a></li>
<li>Michot C, Le Goff C, Mahaut C, Afenjar A, Brooks AS, Campeau PM, Destree A, Di
Rocco M, Donnai D, Hennekam R, Heron D, Jacquemont S, Kannu P, Lin AE,
Manouvrier-Hanu S, Mansour S, Marlin S, McGowan R, Murphy H, Raas-Rothschild A,
Rio M, Simon M, Stolte-Dijkstra I, Stone JR, Sznajer Y, Tolmie J, Touraine R, van
den Ende J, Van der Aa N, van Essen T, Verloes A, Munnich A, Cormier-Daire V.
Myhre and LAPS syndromes: clinical and molecular review of 32 patients. Eur J Hum
Genet. 2014 Nov;22(11):1272-7. doi: 10.1038/ejhg.2013.288. Epub 2014 Jan 15.
Erratum In: Eur J Hum Genet. 2014 Nov;22(11):1340. <a href="https://pubmed.ncbi.nlm.nih.gov/24424121" target="TheNewWin">Citation on PubMed</a> or <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4200423/" target="TheNewWin">Free article on PubMed Central</a></li>
<li>Starr LJ, Grange DK, Delaney JW, Yetman AT, Hammel JM, Sanmann JN, Perry DA,
Schaefer GB, Olney AH. Myhre syndrome: Clinical features and restrictive
cardiopulmonary complications. Am J Med Genet A. 2015 Dec;167A(12):2893-901. doi:
10.1002/ajmg.a.37273. Epub 2015 Sep 30. <a href="https://pubmed.ncbi.nlm.nih.gov/26420300" target="TheNewWin">Citation on PubMed</a></li>
</ul>
</div>
</section>
</div>
</div>
<div class="side">
<aside>
<section><div class="side-section">
<div class="mp-img">
<a class="image-modal" id="14358_featured" href="https://medlineplus.gov/images/PX0003CK_PRESENTATION.jpeg"
data-filepath="images/PX0003CK_PRESENTATION.jpeg"
data-title="Girl with Myhre syndrome"
data-caption="Girl with Myhre syndrome at ages newborn, 1 year, 3.5 years, and 7 years."
data-credit="GeneReviews, © 1993-2020 University of Washington"
data-alt="Girl with Myhre syndrome at ages newborn, 1 year, 3.5 years, and 7 years."
data-sourceurl="https://www.ncbi.nlm.nih.gov/books/NBK425723/figure/myhre.F2/?report=objectonly">
<img class="scale-with-grid" src="https://medlineplus.gov/images/PX0003CK_PRESENTATION.jpeg" alt="" title="Girl with Myhre syndrome">
<span class="view-img-full-size" title="Show image">Enlarge image</span>
</a>
</div>
</div></section>
<section><div class="side-section">
</div></section>
<section><div class="side-section">
<div class="section-header">
<h2>Related Health Topics</h2>
</div>
<div class="section-body">
<ul class="relatedmp">
<li><a href="https://medlineplus.gov/developmentaldisabilities.html">Developmental Disabilities</a></li>
<li><a href="https://medlineplus.gov/geneticdisorders.html">Genetic Disorders</a></li>
<li><a href="https://medlineplus.gov/hearingdisordersanddeafness.html">Hearing Disorders and Deafness</a></li>
</ul>
</div>
</div></section>
<section><div class="side-section">
<div class="section-header red">
<h2>MEDICAL ENCYCLOPEDIA</h2>
</div>
<div class="section-body" id="more_encyclopedia">
<ul class="relatedmp" style="list-style: none; padding: 0;">
<li><a href="https://medlineplus.gov/ency/article/002048.htm">Genetics</a></li>
<li><a href="https://medlineplus.gov/ency/article/001103.htm">Pericarditis - constrictive</a></li>
<li><a href="https://medlineplus.gov/ency/article/003271.htm">Short stature</a></li>
</ul>
</div>
</div></section>
<section><div class="side-section">
<div class="section-header">
<h2>Understanding Genetics</h2>
</div>
<div class="section-body">
<ul class="relatedmp">
<li><a href="https://medlineplus.gov/genetics/understanding/consult/prognosis/">What is the prognosis of a genetic condition?</a></li>
<li><a href="https://medlineplus.gov/genetics/understanding/mutationsanddisorders/mutationscausedisease/">How can gene variants affect health and development?</a></li>
<li><a href="https://medlineplus.gov/genetics/understanding/inheritance/runsinfamily/">What does it mean if a disorder seems to run in my family?</a></li>
<li><a href="https://medlineplus.gov/genetics/understanding/inheritance/inheritancepatterns/">What are the different ways a genetic condition can be inherited?</a></li>
<li><a href="https://medlineplus.gov/genetics/understanding/consult/treatment/">How are genetic conditions treated or managed?</a></li>
</ul>
</div>
</div></section>
<section><div class="side-section">
<div class="section-header hide-offscreen">
<h2>Disclaimers</h2>
</div>
<div class="section-body no-header">
MedlinePlus links to health information from the National Institutes of Health and other federal government agencies. MedlinePlus also links to health information from non-government Web sites. See our <a href="https://medlineplus.gov/disclaimers.html">disclaimer</a> about external links and our <a href="https://medlineplus.gov/criteria.html">quality guidelines</a>.
</div>
</div></section>
</aside>
</div>
<div class="bottom">
<section>
<!--
<div class="from-ghr">
<img src="https://medlineplus.gov/images/fromGHR.png" alt="From Genetics Home Reference" />
<p>Genetics Home Reference has merged with MedlinePlus. Genetics Home Reference content now can be found in the "Genetics" section of MedlinePlus. <a href="https://medlineplus.gov/about/general/genetics/newhome/">Learn more</a></p>
</div>
-->
<p>The information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.</p>
</section>
</div>
</article>
</div>
<div id="citation-how-to">
<button><span>Learn how to cite this page</span></button>
</div>
</div>
<footer>
<div id="mplus-footer">
<div class="footer1">
<ul class="secondarynav">
<li><a href="https://medlineplus.gov/about/">About MedlinePlus</a></li>
<li><a href="https://medlineplus.gov/whatsnew/">What's New</a></li>
<li><a href="https://medlineplus.gov/sitemap.html">Site Map</a></li>
<li><a href="https://support.nlm.nih.gov/knowledgebase/category/?id=CAT-01231&category=medlineplus&from=https%3A//medlineplus.gov/genetics/condition/myhre-syndrome/" target="_blank"><span>Customer Support</span></a></li>
</ul>
<ul class="follow-footer">
<li>
<a href="https://medlineplus.gov/rss.html" class="follow-item">Subscribe to RSS<img src="https://medlineplus.gov/images/feed.png" class="social-media-toolkit-icon" alt="RSS" title="RSS"></a>
</li>
<li>
<span class="follow-label">Follow us</span>
<a href="https://twitter.com/medlineplus" class="follow-item" target="_blank">
<img src="https://medlineplus.gov/images/i_share_twitter.png" class="follow-icon" alt="X" title="X">
</a>
<a href="https://facebook.com/Mplus.gov/" class="follow-item" target="_blank">
<img src="https://medlineplus.gov/images/i_share_fb.png" class="follow-icon" alt="Facebook" title="Facebook">
</a>
<a href="https://www.instagram.com/mplusgov/" class="follow-item" target="_blank">
<img src="https://medlineplus.gov/images/Instagram_Glyph_Gradient_RGB.png" class="follow-icon" alt="Instagram" title="Instagram">
</a>
</li>
<li>
<a href="https://medlineplus.gov/social-media-toolkit/" class="social-media-toolkit-item">Social Media Toolkit<img src="https://medlineplus.gov/images/i_social_media_toolkit.png" class="social-media-toolkit-icon" alt="Social Media Toolkit" title="Social Media Toolkit"></a>
</li>
</ul>
</div>
<div class="footer2">
<ul>
<li><a href=" https://www.nlm.nih.gov/web_policies.html" target='_blank'>NLM Web Policies</a></li>
<li><a href="https://medlineplus.gov/about/using/usingcontent/" >Copyright</a></li>
<li><a href="https://medlineplus.gov/accessibility.html">Accessibility</a></li>
<li><a href="https://medlineplus.gov/about/using/criteria/">Guidelines for Links</a></li>
<li><a href="https://medlineplus.gov/plugins.html">Viewers & Players</a></li>
<li><a href="https://www.hhs.gov/vulnerability-disclosure-policy/index.html" target="_blank">HHS Vulnerability Disclosure</a></li>
<li><a href="https://medlineplus.gov/medlineplus-connect/">MedlinePlus Connect for EHRs</a></li>
<li><a href="https://medlineplus.gov/about/developers/">For Developers</a></li>
</ul>
<div class="address">
<a href="https://www.nlm.nih.gov" target="_blank">National Library of Medicine</a>
<span>8600 Rockville Pike, Bethesda, MD 20894</span>
<a href="https://www.hhs.gov" target="_blank">U.S. Department of Health and Human Services</a>
<a href="https://www.nih.gov" target="_blank">National Institutes of Health</a>
</div>
<div class="date">
<span id="lastupdate">Last updated February 1, 2020</span>
</div>
<div class="return-top"><a href="#top" title="Return to top"><img class="return-top-icon" alt="Return to top" src="https://medlineplus.gov/images/return-top.png"></a></div>
</div>
</div>
</footer>
</div>
<script src="https://medlineplus.gov/jslib/jquery-3.6.0.min.js" type="text/javascript"></script>
<script src="https://medlineplus.gov/jslib/mplus-frontend-controls-new.js" type="text/javascript"></script>
<script src="https://medlineplus.gov/jslib/mplus-share.js?id=1112022" type="text/javascript"></script>
<!--[if lte IE 9]><script src="//www.nlm.nih.gov/medlineplus/jslib/jquery.placeholder.js" type="text/javascript"></script><![endif]-->
<script src="https://medlineplus.gov/jslib/control.js" type="text/javascript"></script>
<script src="https://medlineplus.gov/uswds/js/uswds.min.js" type="text/javascript"></script>
</body>
</html>