title: An unusual cause of subarachnoid hemorrhage.
abstract: A 47-year-old man presented to our hospital with collapse secondary to a subarachnoid hemorrhage. A careful history taking revealed symptoms of anaphylaxis before his collapse. This case illustrates an unusual cause of subarachnoid hemorrhage.
authors.forename: Yuen
authors.initials: Y
authors.lastname: Su
authors.forename: Constance
authors.initials: C
authors.lastname: Katelaris