title: 25-year-old man with recurring headache and confusion.
authors.affiliation: Loma Linda University School of Medicine, Loma Linda, Calif., USA.
authors.forename: F B
authors.initials: FB
authors.lastname: Nahab
authors.forename: G A
authors.initials: GA
authors.lastname: Worrell
authors.forename: B G
authors.initials: BG
authors.lastname: Weinshenker
mesh_terms: D000328:Adult; D003221:Confusion / Q000209:etiology*; D003937:Diagnosis, Differential; D004660:Encephalitis / Q000175:diagnosis; D006801:Humans; D008297:Male; D008581:Meningitis / Q000175:diagnosis; D020325:Migraine with Aura / Q000175:diagnosis* / Q000188:drug therapy; D012640:Seizures / Q000175:diagnosis; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis