title: Is perimesencephalic nonaneurysmal hemorrhage of venous origin?
authors.forename: Yuji
authors.initials: Y
authors.lastname: Matsumaru
authors.forename: Kiyoyuki
authors.initials: K
authors.lastname: Yanaka
authors.forename: Akira
authors.initials: A
authors.lastname: Matsumura
mesh_terms: D002533:Cerebral Angiography; D006801:Humans; D020300:Intracranial Hemorrhages / Q000000981:diagnostic imaging*; D008636:Mesencephalon / Q000098:blood supply*