Question 1799
{"accessible":false,"alternatives":[{"id":8937,"text":"commonly have a bright rim sign around the tumor on FLAIR sequences"},{"id":8941,"text":" commonly diagnosed in children and young adults"},{"id":8940,"text":"commonly encountered in the temporal lobe"},{"id":8938,"text":"commonly have a high signal 'bubbly appearance' on T2 sequences"},{"id":8939,"text":"commonly undergo malignant transformation"}],"archived":false,"correctAlternativeId":8939,"explanation":"\u003cp\u003eDysembryoplastic neuroepithelial tumors\u0026nbsp;(DNET)\u0026nbsp;are benign, classified\u0026nbsp;(WHO Grade 1).\u0026nbsp;Typically seen in children or young adults. Over ~65% of cases are located in the temporal lobe.\u0026nbsp;\u003c/p\u003e\u003cp\u003eOn MRI they elicit a low signal on T1 compared to the adjacent brain, high T2 \"'bubbly appearance',\u0026nbsp;mixed-signal with\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/bright-rim-sign-dnet-1?lang=gb\"\u003ebright rim sign\u003c/a\u003e\u0026nbsp;and\u0026nbsp;partial suppression of some of the \"bubbles\" on FLAIR sequence, and may show\u0026nbsp;heterogeneous or a mural nodule enhancement on postcontrast sequences\u0026nbsp;with no restricted diffusion on DWI. Malignant transformation is considered exceptionally rare.\u0026nbsp;\u003c/p\u003e","id":1799,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1799","nextQuestionPath":null,"relatedArticles":[{"id":1251,"title":"Dysembryoplastic neuroepithelial tumor","link":"/articles/dysembryoplastic-neuroepithelial-tumour?lang=us"}],"alsoUsedIn":[{"id":1174,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1174","link":"https://radiopaedia.org/courses/adult-neuroradiology-review-course/pages/1174"},{"id":1174,"kind":"Course","title":"Adult Neuroradiology Review Course - page 1174","link":"https://radiopaedia.org/courses/adult-brain-mri-review-course-2015-online-video/pages/1174"}],"stem":"\u003cp\u003eWhich of the following is\u0026nbsp;\u003cstrong\u003eLEAST \u003c/strong\u003ecorrect regarding\u0026nbsp;dysembryoplastic neuroepithelial tumors (DNET)?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1799"}],"attemptsPercentages":[{"alternativeId":"8938","percentage":8},{"alternativeId":"8941","percentage":2},{"alternativeId":"8939","percentage":84},{"alternativeId":"8937","percentage":5},{"alternativeId":"8940","percentage":2}],"promptToLogin":false,"questionManager":false,"articleId":"bright-rim-sign-dnet"}