Question 1889
{"accessible":false,"alternatives":[{"id":9380,"text":"ganglioneuroma"},{"id":9381,"text":"metastases"},{"id":9382,"text":"neurofibroma"},{"id":9383,"text":"schwannoma "}],"archived":false,"correctAlternativeId":9383,"explanation":"\u003cp\u003eMost nerve sheath tumors arise from the dorsal sensory roots. 70% are intradural extramedullary in location, 15% are purely extradural and a further 15% have both intradural and extradural components (“dumbbell” lesions). Less than 1% are intramedullary.\u003c/p\u003e\u003cp\u003eSpinal nerve sheath tumors include, in order of decreasing frequency:\u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https://radiopaedia.org/articles/spinal-schwannoma?lang=gb\"\u003espinal schwannoma\u003c/a\u003e\u0026nbsp;(30% of all intradural extramedullary lesions and 65% of intradural extramedullary nerve sheath tumors)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://radiopaedia.org/articles/spinal-neurofibroma?lang=gb\"\u003espinal neurofibroma\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://radiopaedia.org/articles/paraspinal-ganglioneuroma?lang=gb\"\u003espinal ganglioneuroma\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\u003cp\u003e\u003ca title=\"Intradural extramedullary metastases\" class=\"internal\" href=\"/articles/intradural-extramedullary-metastases\"\u003eIntradural extramedullary metastases\u003c/a\u003e\u0026nbsp;are rare and only account for approximately 5% of\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/spinal-metastases?lang=gb\"\u003espinal metastases\u003c/a\u003e.\u003c/p\u003e\u003cp\u003e\u0026nbsp;\u003c/p\u003e","id":1889,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1889","nextQuestionPath":"/articles/spinal-schwannoma/questions/1872","relatedArticles":[{"id":9578,"title":"Ganglioneuroma","link":"/articles/ganglioneuroma?lang=us"},{"id":19576,"title":"Spinal neurofibroma","link":"/articles/spinal-neurofibroma?lang=us"},{"id":19242,"title":"Intradural extramedullary metastases","link":"/articles/intradural-extramedullary-metastases?lang=us"},{"id":19240,"title":"Spinal nerve sheath tumors","link":"/articles/spinal-nerve-sheath-tumours?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhat is the most common spinal nerve sheath tumor?\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/1889"}],"attemptsPercentages":[{"alternativeId":"9380","percentage":1},{"alternativeId":"9382","percentage":12},{"alternativeId":"9381","percentage":1},{"alternativeId":"9383","percentage":87}],"promptToLogin":false,"questionManager":false,"articleId":"spinal-schwannoma"}