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<title>Fibrodysplasia ossificans progressiva - Genes and Disease - NCBI Bookshelf</title>
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<meta name="robots" content="INDEX,FOLLOW,NOARCHIVE" /><meta name="citation_inbook_title" content="Genes and Disease [Internet]" /><meta name="citation_title" content="Fibrodysplasia ossificans progressiva" /><meta name="citation_publisher" content="National Center for Biotechnology Information (US)" /><meta name="citation_date" content="1998" /><meta name="citation_author" content="National Center for Biotechnology Information (US)" /><meta name="citation_fulltext_html_url" content="https://www.ncbi.nlm.nih.gov/books/NBK22182/" /><link rel="schema.DC" href="http://purl.org/DC/elements/1.0/" /><meta name="DC.Title" content="Fibrodysplasia ossificans progressiva" /><meta name="DC.Type" content="Text" /><meta name="DC.Publisher" content="National Center for Biotechnology Information (US)" /><meta name="DC.Contributor" content="National Center for Biotechnology Information (US)" /><meta name="DC.Date" content="1998" /><meta name="DC.Identifier" content="https://www.ncbi.nlm.nih.gov/books/NBK22182/" /><meta name="description" content="Fibrodysplasia Ossificans Progressiva (FOP) is an extremely rare genetic disease that causes muscle to be turned into bone. The condition was first reported in the 17th century by Patin, a French physician, who described a woman who &quot;turned into wood&quot;. The wood he described was actually the formation of new bone." /><meta name="og:title" content="Fibrodysplasia ossificans progressiva" /><meta name="og:type" content="book" /><meta name="og:description" content="Fibrodysplasia Ossificans Progressiva (FOP) is an extremely rare genetic disease that causes muscle to be turned into bone. The condition was first reported in the 17th century by Patin, a French physician, who described a woman who &quot;turned into wood&quot;. The wood he described was actually the formation of new bone." /><meta name="og:url" content="https://www.ncbi.nlm.nih.gov/books/NBK22182/" /><meta name="og:site_name" content="NCBI Bookshelf" /><meta name="og:image" content="https://www.ncbi.nlm.nih.gov/corehtml/pmc/pmcgifs/bookshelf/thumbs/th-gnd-lrg.png" /><meta name="twitter:card" content="summary" /><meta name="twitter:site" content="@ncbibooks" /><meta name="bk-non-canon-loc" content="/books/n/gnd/fibrodysplasiaossificansprogressiva/" /><link rel="canonical" href="https://www.ncbi.nlm.nih.gov/books/NBK22182/" /><link rel="stylesheet" href="/corehtml/pmc/css/figpopup.css" type="text/css" media="screen" /><link rel="stylesheet" href="/corehtml/pmc/css/bookshelf/2.26/css/books.min.css" type="text/css" /><link rel="stylesheet" href="/corehtml/pmc/css/bookshelf/2.26/css/books_print.min.css" type="text/css" /><style type="text/css">p a.figpopup{display:inline !important} .bk_tt {font-family: monospace} .first-line-outdent .bk_ref {display: inline} </style><script type="text/javascript" src="/corehtml/pmc/js/jquery.hoverIntent.min.js"> </script><script type="text/javascript" src="/corehtml/pmc/js/common.min.js?_=3.18"> </script><script type="text/javascript">window.name="mainwindow";</script><script type="text/javascript" src="/corehtml/pmc/js/bookshelf/2.26/book-toc.min.js"> </script><script type="text/javascript" src="/corehtml/pmc/js/bookshelf/2.26/books.min.js"> </script>
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<div class="pre-content"><div><div class="bk_prnt"><p class="small">NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.</p><p>National Center for Biotechnology Information (US). Genes and Disease [Internet]. Bethesda (MD): National Center for Biotechnology Information (US); 1998-. </p></div></div></div>
<div class="main-content lit-style" itemscope="itemscope" itemtype="http://schema.org/CreativeWork"><div class="meta-content fm-sec"><h1 id="_NBK22182_"><span class="title" itemprop="name">Fibrodysplasia ossificans progressiva</span></h1></div><div class="body-content whole_rhythm" itemprop="text"><div class="graphic"><img src="/books/NBK22182/bin/fop.jpg" alt="Image fop.jpg" /></div><p>Fibrodysplasia Ossificans Progressiva (FOP) is an extremely rare genetic disease that causes muscle to be turned into bone. The condition was first reported in the 17th century by Patin, a French physician, who described a woman who "turned into wood". The wood he described was actually the formation of new bone. </p><p>FOP is an autosomal dominant condition, but most cases are sporadic. FOP patients have a genetic fault, which means that their bodies cannot switch off the mechanism that grows the skeleton in the womb. Any small injury to connective tissue (muscles, ligaments, and tendons) can result in the formation of hard bone around the damaged site. Children are born with a characteristic malformation of the great toes and begin to develop heterotopic (extra) bone formation during early childhood. Eventually, a second skeleton begins to form that severely restricts mobility. </p><p>FOP affects 1 of 2 million people. Because of the very small numbers of patients, identifying the mutation(s) causing FOP is difficult. There are several genes that have been implicated in the disease process. For example, when the <i>Noggin</i> gene (<i>NOG</i>) is deleted in mice, the mice are unable to stop the deposition of bone, causing an FOP-like disease. Another gene of interest is the Bone Morphogenic Protein gene (<i>BMP</i>), which Noggin regulates. Proteins encoded by <i>BMP</i> induce bone formation, and one of their roles is to stimulate the formation of the fetal skeleton. In FOP, lymphocytes deliver BMP4 to areas of damaged muscle, and so initiate bone growth rather than aid tissue repair. </p><p>It is hoped that future studies will pinpoint the mutation(s) occurring in FOP and lead to a better understanding of the disease&#x02019;s mechanism.</p><div id="fibrodysplasiaossificansprogressiva.disease-categories"><h2 id="_fibrodysplasiaossificansprogressiva_disease-categories_">Related diseases</h2><ul class="simple-list"><li class="half_rhythm"><div>
<a href="/books/n/gnd/A59/">See other Muscle and Bone Diseases</a>
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