Question 461
{"accessible":true,"alternatives":[{"id":2312,"text":"abscess"},{"id":2313,"text":"glioblastoma"},{"id":2314,"text":"metastasis"},{"id":2315,"text":"hemangioblastoma"},{"id":2316,"text":"pilocytic astrocytoma"}],"archived":false,"correctAlternativeId":2312,"explanation":"\u003cp\u003eThe thin regular rim enhancement and high DWI signal in the fluid component is very suggestive of an abscess, which is the diagnosis which is not only most likely but which requires exclusion. Occasionally hemorrhagic metastases may also have high DWI signal due to blood product.\u0026nbsp;\u003c/p\u003e\u003cp\u003eGlioblastomas are rare in the posterior fossa. Hemangioblastomas tend to not have enhancing walls and do not restrict centrally. Pilocytic astrocytomas are found in much younger individuals and also do not have restricting fluid.\u0026nbsp;\u003c/p\u003e","id":461,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/781/images-for-mcqs-1__2__big_gallery.jpeg","imageAttribution":{"kind":"case","rID":9695},"imageAttributionCaseInfo":{"title":"Cerebellar abscess","contributor_name":"Frank Gaillard","contributor_param":"frank","case_rid":9695,"case_param":"cerebellar-abscess"},"firstQuestionPath":"/questions/2593","nextQuestionPath":"/articles/cerebral-abscess-1/questions/446","relatedArticles":[{"id":4924,"title":"Brain metastases","link":"/articles/brain-metastases?lang=us"},{"id":4910,"title":"Glioblastoma, IDH-wildtype","link":"/articles/glioblastoma-idh-wildtype?lang=us"},{"id":1876,"title":"Pilocytic astrocytoma","link":"/articles/pilocytic-astrocytoma?lang=us"},{"id":1412,"title":"Hemangioblastoma (central nervous system)","link":"/articles/haemangioblastoma-central-nervous-system-2?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eAn elderly man presents with ataxia and headache. 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/461"}],"attemptsPercentages":[{"alternativeId":"2313","percentage":4},{"alternativeId":"2314","percentage":13},{"alternativeId":"2315","percentage":3},{"alternativeId":"2316","percentage":4},{"alternativeId":"2312","percentage":77}],"promptToLogin":false,"questionManager":false,"articleId":"cerebral-abscess"}