title: A 40-year old woman with headache.
authors.affiliation: Medical Service, VA Maryland Health Care System and the Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA.
authors.forename: Rohit
authors.initials: R
authors.lastname: Talwani
authors.forename: Philip A
authors.initials: PA
authors.lastname: Mackowiak
authors.forename: Sonia E
authors.initials: SE
authors.lastname: Blome
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006261:Headache / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D008582:Meningitis, Aseptic / Q000175:diagnosis / Q000503:physiopathology