Posterior fossa aneurysms presenting as mass lesions.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001488:Basilar Artery / Q000000981:diagnostic imaging; D001932:Brain Neoplasms / Q000000981:diagnostic imaging*; D002533:Cerebral Angiography; D002543:Cerebral Hemorrhage / Q000473:pathology; D014695:Cerebral Ventriculography; D003388:Cranial Fossa, Posterior / Q000000981:diagnostic imaging; D003638:Deafness / Q000209:etiology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008722:Methods; D008875:Middle Aged; D013129:Spinal Puncture