Question 323
{"accessible":false,"alternatives":[{"id":1576,"text":"angioblastic meningioma"},{"id":1577,"text":"gemistocytic astroctyoma"},{"id":1578,"text":"glioneuronal leptomeningeal tumor"},{"id":1579,"text":"skull osteosarcoma"},{"id":1580,"text":"solitary fibrous tumors of the dura"}],"archived":false,"correctAlternativeId":1580,"explanation":"\u003cp\u003eHemangiopericytomas were previously classified as angioblastic sub-type meningiomas, then considered to arise from smooth muscle perivascular pericytes of dural capillaries (pericytes of Zimmerman), but the most recent studies suggesting that these lesion are actually arising from fibroblast and considered in the spectrum of the solitary fibrous tumors of the dura. In fact in the latest (2016) update to the WHO classification of CNS tumors the two entities have been combined.\u0026nbsp;\u003c/p\u003e","id":323,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/509","nextQuestionPath":"/articles/meningeal-haemangiopericytoma-historical/questions/16","relatedArticles":[{"id":2277,"title":"WHO classification of CNS tumors","link":"/articles/who-classification-of-cns-tumours-1?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eIn the current WHO classification of CNS tumors (2021), hemangiopericytomas are considered as part of spectrum with which other 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/323"}],"attemptsPercentages":[{"alternativeId":"1580","percentage":77},{"alternativeId":"1578","percentage":6},{"alternativeId":"1576","percentage":14},{"alternativeId":"1579","percentage":1},{"alternativeId":"1577","percentage":2}],"promptToLogin":false,"questionManager":false,"articleId":"meningeal-hemangiopericytoma-historical"}