Question 444
{"accessible":true,"alternatives":[{"id":2228,"text":"cerebellar metastasis"},{"id":2229,"text":"hemangioblastoma"},{"id":2230,"text":"medulloblastoma"},{"id":2231,"text":"pilocytic astrocytoma"},{"id":2232,"text":"pleomorphic xanthoastrocytoma"}],"archived":false,"correctAlternativeId":2231,"explanation":"\u003cp\u003eThe presence of enhancement in the cyst wall is unusual in hemangioblastomas, but common in pilocytic astrocytomas. The absence of flow voids also is against the diagnosis of a hemangioblastoma.\u0026nbsp;\u003c/p\u003e\u003cp\u003eAlthough pleomorphic xanthoastrocytomas can present as a cyst with a mural nodule, they are far less common and usually supratentorial.\u0026nbsp;\u003c/p\u003e\u003cp\u003eMedulloblastomas tend not to present as a cyst with a mural nodule, even in adults with SHH subtypes.\u0026nbsp;\u003c/p\u003e\u003cp\u003eCerebellar metastases are common in the more elderly population\u0026nbsp;but would be distinctly uncommon in this age group.\u0026nbsp;\u003c/p\u003e\u003cp\u003e\u003c/p\u003e","id":444,"imageUrl":"https://prod-images-static.radiopaedia.org/images/28844071/6d76ae00f96a141112981fd4dd08ff_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":50983},"imageAttributionCaseInfo":{"title":"Images for MCQs","contributor_name":"Frank Gaillard","contributor_param":"frank","case_rid":50983,"case_param":"images-for-mcqs-1"},"firstQuestionPath":"/questions/2249","nextQuestionPath":"/articles/pilocytic-astrocytoma/questions/443","relatedArticles":[{"id":4924,"title":"Brain metastases","link":"/articles/brain-metastases?lang=us"},{"id":5335,"title":"Medulloblastoma","link":"/articles/medulloblastoma?lang=us"},{"id":1914,"title":"Posterior cranial fossa tumors","link":"/articles/posterior-cranial-fossa-tumours?lang=us"},{"id":1895,"title":"Pleomorphic xanthoastrocytoma","link":"/articles/pleomorphic-xanthoastrocytoma?lang=us"},{"id":1412,"title":"Hemangioblastoma (central nervous system)","link":"/articles/haemangioblastoma-central-nervous-system-2?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eA 20-year-old previously well woman presents with headaches and an MRI is performed. What is the most likely diagnosis?\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/444"}],"attemptsPercentages":[{"alternativeId":"2228","percentage":1},{"alternativeId":"2229","percentage":19},{"alternativeId":"2232","percentage":6},{"alternativeId":"2231","percentage":71},{"alternativeId":"2230","percentage":3}],"promptToLogin":false,"questionManager":false,"articleId":"pilocytic-astrocytoma"}