{"id":1123,"date":"2018-03-29T18:14:48","date_gmt":"2018-03-29T18:14:48","guid":{"rendered":"https:\/\/blogs.bmj.com\/jmg\/?p=1123"},"modified":"2026-02-24T15:55:24","modified_gmt":"2026-02-24T15:55:24","slug":"chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/jmg\/2018\/03\/29\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders\/","title":{"rendered":"Chitayat-Hall and Schaaf-Yang syndromes: a common aetiology: expanding the phenotype of MAGEL2-related disorders (Contributed by Dr. Rebekah Jobling)"},"content":{"rendered":"<p style=\"margin: 0in;margin-bottom: .0001pt;background: white\"><span style=\"font-family: 'Calibri',sans-serif;color: black\">Chitayat-Hall syndrome (CHS) causes contractures of hands and feet, intellectual disability and growth hormone (GH) deficiency, among other features. GH deficiency leads to poor growth and may cause recurrent episodes of hypoglycemia, which can damage the developing brain if untreated. We identify mutations in MAGEL2, located within the Prader-Willi syndrome region at 15q11-q13, as the cause of CHS. Our findings indicate that CHS and Schaaf-Yang syndrome are the same condition. We describe the diagnosis and treatment of GH deficiency in 6 affected patients. GH deficiency is an important complication of this condition, and timely diagnosis and treatment can lead to improved growth and prevention of hypoglycemia. (<a href=\"http:\/\/jmg.bmj.com\/content\/early\/2018\/03\/29\/jmedgenet-2017-105222\">http:\/\/jmg.bmj.com\/content\/early\/2018\/03\/29\/jmedgenet-2017-105222<\/a> )<\/span><\/p>\n<p><!--TrendMD v2.4.8--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Chitayat-Hall syndrome (CHS) causes contractures of hands and feet, intellectual disability and growth hormone (GH) deficiency, among other features. GH deficiency leads to poor growth and may cause recurrent episodes of hypoglycemia, which can damage the developing brain if untreated. We identify mutations in MAGEL2, located within the Prader-Willi syndrome region at 15q11-q13, as the [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/blogs.bmj.com\/jmg\/2018\/03\/29\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-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-1123","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Chitayat-Hall and Schaaf-Yang syndromes: a common aetiology: expanding the phenotype of MAGEL2-related disorders (Contributed by Dr. Rebekah Jobling) - 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\/2018\/03\/29\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chitayat-Hall and Schaaf-Yang syndromes: a common aetiology: expanding the phenotype of MAGEL2-related disorders (Contributed by Dr. Rebekah Jobling) - JMG Contact blog\" \/>\n<meta property=\"og:description\" content=\"Chitayat-Hall syndrome (CHS) causes contractures of hands and feet, intellectual disability and growth hormone (GH) deficiency, among other features. GH deficiency leads to poor growth and may cause recurrent episodes of hypoglycemia, which can damage the developing brain if untreated. We identify mutations in MAGEL2, located within the Prader-Willi syndrome region at 15q11-q13, as the [...]Read More...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.bmj.com\/jmg\/2018\/03\/29\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders\/\" \/>\n<meta property=\"og:site_name\" content=\"JMG Contact blog\" \/>\n<meta property=\"article:published_time\" content=\"2018-03-29T18:14:48+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-24T15:55:24+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\\\/2018\\\/03\\\/29\\\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/03\\\/29\\\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders\\\/\"},\"author\":{\"name\":\"hqqu\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/#\\\/schema\\\/person\\\/be0250f8d5b52412c3e7c222dabd591b\"},\"headline\":\"Chitayat-Hall and Schaaf-Yang syndromes: a common aetiology: expanding the phenotype of MAGEL2-related disorders (Contributed by Dr. Rebekah Jobling)\",\"datePublished\":\"2018-03-29T18:14:48+00:00\",\"dateModified\":\"2026-02-24T15:55:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/03\\\/29\\\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders\\\/\"},\"wordCount\":133,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/03\\\/29\\\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/03\\\/29\\\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders\\\/\",\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/03\\\/29\\\/chitayat-hall-and-schaaf-yang-syndromes-a-common-aetiology-expanding-the-phenotype-of-magel2-related-disorders\\\/\",\"name\":\"Chitayat-Hall and Schaaf-Yang syndromes: a common aetiology: expanding the phenotype of MAGEL2-related disorders (Contributed by Dr. Rebekah Jobling) - 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