{"id":1155,"date":"2018-07-14T18:11:06","date_gmt":"2018-07-14T18:11:06","guid":{"rendered":"https:\/\/blogs.bmj.com\/jmg\/?p=1155"},"modified":"2026-02-24T15:50:46","modified_gmt":"2026-02-24T15:50:46","slug":"paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/jmg\/2018\/07\/14\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\/","title":{"rendered":"Paternal uniparental disomy of chromosome 19 in a pair of monochorionic diamniotic twins with dysmorphic features and developmental delay (Contributed by Kit San Yeung)"},"content":{"rendered":"<p>Uniparental disomy (UPD) occurs when a person obtains both copies of the homologous chromosome from one parent. UPD can be associated with human diseases caused by disruption of genomic imprinting or homozygosity for a recessive trait. In this report, we describe the first human case of paternal UPD for chromosome 19 in monozygotic twins showing dysmorphic features and global developmental delay. Comprehensive genetics and DNA methylation analysis suggested that imprinting defects were considered a potentially important mechanism to explain the clinical features of the twins. However, reports of additional patients are necessary to further delineate the clinical spectrum of paternal UPD for chromosome 19 and to define a recognizable human syndrome. (<a href=\"https:\/\/jmg.bmj.com\/content\/early\/2018\/07\/13\/jmedgenet-2018-105328\">https:\/\/jmg.bmj.com\/content\/early\/2018\/07\/13\/jmedgenet-2018-105328<\/a> )<\/p>\n<p><a href=\"https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/HK-team.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1156\" src=\"https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/HK-team-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/HK-team-300x225.jpg 300w, https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/HK-team-768x576.jpg 768w, https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/HK-team-1024x768.jpg 1024w, https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/HK-team-640x480.jpg 640w, https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/HK-team.jpg 1600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><a href=\"https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/Toronto-team.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1157\" src=\"https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/Toronto-team-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/Toronto-team-300x225.jpg 300w, https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/Toronto-team-768x576.jpg 768w, https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/Toronto-team-1024x768.jpg 1024w, https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/Toronto-team-640x480.jpg 640w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><!--TrendMD v2.4.8--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Uniparental disomy (UPD) occurs when a person obtains both copies of the homologous chromosome from one parent. UPD can be associated with human diseases caused by disruption of genomic imprinting or homozygosity for a recessive trait. In this report, we describe the first human case of paternal UPD for chromosome 19 in monozygotic twins showing [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/blogs.bmj.com\/jmg\/2018\/07\/14\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\/\">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-1155","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>Paternal uniparental disomy of chromosome 19 in a pair of monochorionic diamniotic twins with dysmorphic features and developmental delay (Contributed by Kit San Yeung) - 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\/07\/14\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Paternal uniparental disomy of chromosome 19 in a pair of monochorionic diamniotic twins with dysmorphic features and developmental delay (Contributed by Kit San Yeung) - JMG Contact blog\" \/>\n<meta property=\"og:description\" content=\"Uniparental disomy (UPD) occurs when a person obtains both copies of the homologous chromosome from one parent. UPD can be associated with human diseases caused by disruption of genomic imprinting or homozygosity for a recessive trait. In this report, we describe the first human case of paternal UPD for chromosome 19 in monozygotic twins showing [...]Read More...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.bmj.com\/jmg\/2018\/07\/14\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\/\" \/>\n<meta property=\"og:site_name\" content=\"JMG Contact blog\" \/>\n<meta property=\"article:published_time\" content=\"2018-07-14T18:11:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-24T15:50:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.bmj.com\/jmg\/files\/2018\/07\/HK-team.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"1200\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\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\\\/07\\\/14\\\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/07\\\/14\\\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\\\/\"},\"author\":{\"name\":\"hqqu\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/#\\\/schema\\\/person\\\/be0250f8d5b52412c3e7c222dabd591b\"},\"headline\":\"Paternal uniparental disomy of chromosome 19 in a pair of monochorionic diamniotic twins with dysmorphic features and developmental delay (Contributed by Kit San Yeung)\",\"datePublished\":\"2018-07-14T18:11:06+00:00\",\"dateModified\":\"2026-02-24T15:50:46+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/07\\\/14\\\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\\\/\"},\"wordCount\":140,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/07\\\/14\\\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/files\\\/2018\\\/07\\\/HK-team-300x225.jpg\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/07\\\/14\\\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/07\\\/14\\\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\\\/\",\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2018\\\/07\\\/14\\\/paternal-uniparental-disomy-of-chromosome-19-in-a-pair-of-monochorionic-diamniotic-twins-with-dysmorphic-features-and-developmental-delay\\\/\",\"name\":\"Paternal uniparental disomy of chromosome 19 in a pair of monochorionic diamniotic twins with dysmorphic features and developmental delay (Contributed by Kit San Yeung) - 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