A 34-year-old man with recent onset of ataxia.
D000328:Adult; D001259:Ataxia / Q000209:etiology*; D001927:Brain Diseases / Q000150:complications*; D003388:Cranial Fossa, Posterior; D004814:Epidermal Cyst / Q000150:complications*; D006801:Humans; D008297:Male