Infratentorial arachnoid cysts.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001099:Arachnoid / Q000601:surgery; D001927:Brain Diseases / Q000000981:diagnostic imaging / Q000601:surgery; D002530:Cerebellopontine Angle / Q000000981:diagnostic imaging; D014695:Cerebral Ventriculography; D002648:Child; D002675:Child, Preschool; D003388:Cranial Fossa, Posterior / Q000000981:diagnostic imaging / Q000601:surgery; D003560:Cysts / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011011:Pneumoencephalography; D011183:Postoperative Complications; D012886:Skull