title: Subarachnoid and intracerebral hemorrhage from intracranial hemangiopericytoma: An uncommon cause of intracranial hemorrhage.
abstract: BACKGROUND
  Hemorrhage from an intracranial tumor is well known but uncommon. In cases of subarachnoid hemorrhage, aneurysm rupture is a main cause.
  
  
  METHODS
  A 64-year-old woman presented with sudden-onset motor aphasia. Computed tomography revealed subarachnoid hemorrhage, and intracerebral hemorrhage in the left temporal lobe. From the findings of pre-enhancement computed tomography, hemorrhage from a left middle cerebral artery aneurysm was initially suspected. Further radiological examinations demonstrated an enhanced mass with dural attachment in the left temporal region, but no vascular abnormality. Emergency craniotomy was performed, and the tumor and intracerebral hematoma were removed. The hemorrhage from fragile tumor vessels may destroy the tumor tissue and spread into the temporal lobe and subarachnoid space. Pathological examination of the tumor yielded findings consistent with hemangiopericytoma. Post-operatively, the patient was treated to prevent vasospasm.
  
  
  CONCLUSIONS
  Although an intracranial tumor including hemangiopericytoma uncommonly causes subarachnoid hemorrhage, it should be taken into consideration as a source of intracranial hemorrhage.
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Yokohama, Japan.
authors.forename: Syunsuke
authors.initials: S
authors.lastname: Seki
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Yokohama, Japan.
authors.forename: Tomoya
authors.initials: T
authors.lastname: Kamide
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Yokohama, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Tamase
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Yokohama, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Mori
authors.affiliation: Department of Pathology, Yokohama Sakae Kyosai Hospital, Yokohama, Japan.
authors.forename: Kunio
authors.initials: K
authors.lastname: Yanagimoto
authors.affiliation: Department of Neurosurgery, Yokohama Sakae Kyosai Hospital, Yokohama, Japan nomura413jp@yahoo.co.jp.
authors.forename: Motohiro
authors.initials: M
authors.lastname: Nomura
mesh_terms: D001932:Brain Neoplasms / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002533:Cerebral Angiography; D002543:Cerebral Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D005260:Female; D006393:Hemangiopericytoma / Q000150:complications* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D006801:Humans; D008875:Middle Aged; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
keywords: Subarachnoid hemorrhage; brain tumor; hemangiopericytoma; intracerebral hemorrhage