title: Perimesencephalic nonaneurysmal subarachnoid hemorrhage: what is it? what are we missing?
authors: James I
authors: JI
authors: Ausman
mesh_terms: D006801:Humans; D008636:Mesencephalon / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology*; D011859:Radiography; D012307:Risk Factors; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology*