Question 462
{"accessible":true,"alternatives":[{"id":2317,"text":"dysplastic cerebellar gangliocytoma"},{"id":2318,"text":"glioblastoma"},{"id":2319,"text":"hemangioblastoma"},{"id":2320,"text":"medulloblastoma"},{"id":2321,"text":"pilocytic astroctyoma"}],"archived":false,"correctAlternativeId":2320,"explanation":"\u003cp\u003eMedulloblastomas are encountered in young adults. They tend to be located laterally in the hemisphere and show prominent diffusion restriction (low ADC values) which represents their dense cellularity.\u0026nbsp;\u003c/p\u003e\u003cp\u003ePilocytic astrocytomas and hemangioblastomas tend to not be as cellular and are more frequently a vividly enhancing nodule with a cyst. Prominent flow voids are also a common feature of hemangioblastomas.\u0026nbsp;\u003c/p\u003e\u003cp\u003eGlioblastomas are very rare in the cerebellum.\u0026nbsp;Dysplastic cerebellar gangliocytoma (Lhermitte Duclos disease) also does not restrict and has a more striated regular appearance.\u0026nbsp;\u003c/p\u003e","id":462,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/782/images-for-mcqs-1__3__big_gallery.jpeg","imageAttribution":{"kind":"case","rID":38786},"imageAttributionCaseInfo":{"title":"Medulloblastoma","contributor_name":"Bruno Di Muzio","contributor_param":"bmuzio","case_rid":38786,"case_param":"medulloblastoma-33"},"firstQuestionPath":"/questions/3035","nextQuestionPath":"/articles/medulloblastoma/questions/445","relatedArticles":[{"id":1412,"title":"Hemangioblastoma (central nervous system)","link":"/articles/haemangioblastoma-central-nervous-system-2?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":1582,"title":"Dysplastic cerebellar gangliocytoma","link":"/articles/dysplastic-cerebellar-gangliocytoma-1?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eA 30-year-old man, previously well,\u0026nbsp;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/462"}],"attemptsPercentages":[{"alternativeId":"2321","percentage":7},{"alternativeId":"2317","percentage":31},{"alternativeId":"2318","percentage":9},{"alternativeId":"2320","percentage":37},{"alternativeId":"2319","percentage":16}],"promptToLogin":false,"questionManager":false,"articleId":"medulloblastoma"}