{"id":671,"date":"2014-08-08T18:41:38","date_gmt":"2014-08-08T18:41:38","guid":{"rendered":"https:\/\/blogs.bmj.com\/jmg\/?p=671"},"modified":"2026-02-25T19:42:04","modified_gmt":"2026-02-25T19:42:04","slug":"the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/jmg\/2014\/08\/08\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\/","title":{"rendered":"The clinical significance of small copy number variants in neurodevelopmental disorders (Contributed by Prof. Anita Rauch)"},"content":{"rendered":"<p>The majority of neuro-developmental disorders (NDDs) such as intellectual disability are likely due to alterations in the genome. It has been shown that about 30% of these patients have losses or gains of large segments of the genome containing many genes or whole chromosomes as in trisomy 21. In this study, we evaluated the contribution of small gains and losses sizing less than 500 kb affecting only few or single genes. We showed that such smaller changes cause NDDs in 2% of patients. In addition, we discovered three novel genetic conditions associated with losses of the genes <em>MED13L<\/em>, <em>CTNND2<\/em> or <em>ACOT7<\/em>. Our findings are useful for better diagnosis and management of patients with NDDs. (<a href=\"http:\/\/jmg.bmj.com\/content\/early\/2014\/08\/08\/jmedgenet-2014-102588\">http:\/\/jmg.bmj.com\/content\/early\/2014\/08\/08\/jmedgenet-2014-102588<\/a> )<!--TrendMD v2.4.8--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The majority of neuro-developmental disorders (NDDs) such as intellectual disability are likely due to alterations in the genome. It has been shown that about 30% of these patients have losses or gains of large segments of the genome containing many genes or whole chromosomes as in trisomy 21. In this study, we evaluated the contribution [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/blogs.bmj.com\/jmg\/2014\/08\/08\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":123,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-671","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The clinical significance of small copy number variants in neurodevelopmental disorders (Contributed by Prof. Anita Rauch) - JMG Contact blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.bmj.com\/jmg\/2014\/08\/08\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The clinical significance of small copy number variants in neurodevelopmental disorders (Contributed by Prof. Anita Rauch) - JMG Contact blog\" \/>\n<meta property=\"og:description\" content=\"The majority of neuro-developmental disorders (NDDs) such as intellectual disability are likely due to alterations in the genome. It has been shown that about 30% of these patients have losses or gains of large segments of the genome containing many genes or whole chromosomes as in trisomy 21. In this study, we evaluated the contribution [...]Read More...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.bmj.com\/jmg\/2014\/08\/08\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\/\" \/>\n<meta property=\"og:site_name\" content=\"JMG Contact blog\" \/>\n<meta property=\"article:published_time\" content=\"2014-08-08T18:41:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-25T19:42:04+00:00\" \/>\n<meta name=\"author\" content=\"hqqu\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@HuiQiQu\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"hqqu\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2014\\\/08\\\/08\\\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2014\\\/08\\\/08\\\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\\\/\"},\"author\":{\"name\":\"hqqu\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/#\\\/schema\\\/person\\\/be0250f8d5b52412c3e7c222dabd591b\"},\"headline\":\"The clinical significance of small copy number variants in neurodevelopmental disorders (Contributed by Prof. Anita Rauch)\",\"datePublished\":\"2014-08-08T18:41:38+00:00\",\"dateModified\":\"2026-02-25T19:42:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2014\\\/08\\\/08\\\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\\\/\"},\"wordCount\":135,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2014\\\/08\\\/08\\\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2014\\\/08\\\/08\\\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\\\/\",\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2014\\\/08\\\/08\\\/the-clinical-significance-of-small-copy-number-variants-in-neurodevelopmental-disorders\\\/\",\"name\":\"The clinical significance of small copy number variants in neurodevelopmental disorders (Contributed by Prof. Anita Rauch) - 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