{"id":2229,"date":"2026-09-09T21:02:11","date_gmt":"2026-09-09T21:02:11","guid":{"rendered":"https:\/\/blogs.bmj.com\/jmg\/?p=2229"},"modified":"2026-09-09T21:02:11","modified_gmt":"2026-09-09T21:02:11","slug":"phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/jmg\/2026\/09\/09\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\/","title":{"rendered":"Phenotypic manifestations and variant reclassification of germline PTEN variants: a nationwide Danish study (Contributed by Annette Lyngholm Sandsdalen)"},"content":{"rendered":"<p>PTEN Hamartoma Tumor Syndrome (PHTS) is a hereditary syndrome defined by a pathogenic variant in the PTEN tumor suppressor gene. PHTS is rare and associated with an increased risk of different cancers, benign tumors, and neurological manifestations. Collaborating across all departments of clinical genetics in Denmark, we identified patients with PHTS and gathered information in order to calculate prevalence of clinical data, as well as to reclassify variants according to new evidence. We reclassified about a third of our PTEN variants, highlighting the clinical value of ongoing reclassification using PTEN to refine diagnosis, surveillance, and counselling. (<a href=\"https:\/\/jmg.bmj.com\/content\/early\/2026\/09\/09\/jmg-2026-111772\">https:\/\/jmg.bmj.com\/content\/early\/2026\/09\/09\/jmg-2026-111772<\/a>)<!--TrendMD v2.4.8--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PTEN Hamartoma Tumor Syndrome (PHTS) is a hereditary syndrome defined by a pathogenic variant in the PTEN tumor suppressor gene. PHTS is rare and associated with an increased risk of different cancers, benign tumors, and neurological manifestations. Collaborating across all departments of clinical genetics in Denmark, we identified patients with PHTS and gathered information in [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/blogs.bmj.com\/jmg\/2026\/09\/09\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\/\">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-2229","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Phenotypic manifestations and variant reclassification of germline PTEN variants: a nationwide Danish study (Contributed by Annette Lyngholm Sandsdalen) - 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\/2026\/09\/09\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Phenotypic manifestations and variant reclassification of germline PTEN variants: a nationwide Danish study (Contributed by Annette Lyngholm Sandsdalen) - JMG Contact blog\" \/>\n<meta property=\"og:description\" content=\"PTEN Hamartoma Tumor Syndrome (PHTS) is a hereditary syndrome defined by a pathogenic variant in the PTEN tumor suppressor gene. PHTS is rare and associated with an increased risk of different cancers, benign tumors, and neurological manifestations. Collaborating across all departments of clinical genetics in Denmark, we identified patients with PHTS and gathered information in [...]Read More...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.bmj.com\/jmg\/2026\/09\/09\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\/\" \/>\n<meta property=\"og:site_name\" content=\"JMG Contact blog\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-09T21:02:11+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\\\/2026\\\/09\\\/09\\\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2026\\\/09\\\/09\\\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\\\/\"},\"author\":{\"name\":\"hqqu\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/#\\\/schema\\\/person\\\/be0250f8d5b52412c3e7c222dabd591b\"},\"headline\":\"Phenotypic manifestations and variant reclassification of germline PTEN variants: a nationwide Danish study (Contributed by Annette Lyngholm Sandsdalen)\",\"datePublished\":\"2026-09-09T21:02:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2026\\\/09\\\/09\\\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\\\/\"},\"wordCount\":122,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2026\\\/09\\\/09\\\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2026\\\/09\\\/09\\\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\\\/\",\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/jmg\\\/2026\\\/09\\\/09\\\/phenotypic-manifestations-and-variant-reclassification-of-germline-pten-variants-a-nationwide-danish-study-contributed-by-annette-lyngholm-sandsdalen\\\/\",\"name\":\"Phenotypic manifestations and variant reclassification of germline PTEN variants: a nationwide Danish study (Contributed by Annette Lyngholm Sandsdalen) - 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