Spinal extradural arachnoid pouches. Report of two cases.
D000293:Adolescent; D001099:Arachnoid; D002648:Child; D003560:Cysts / Q000000981:diagnostic imaging / Q000601:surgery*; D004388:Dura Mater; D006801:Humans; D008297:Male; D011859:Radiography; D013118:Spinal Cord Diseases / Q000000981:diagnostic imaging / Q000601:surgery*