Extradural cyst.
D000005:Abdomen; D000328:Adult; D003287:Contrast Media; D003560:Cysts / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D009192:Myelography; D010146:Pain / Q000209:etiology; D013118:Spinal Cord Diseases / Q000000981:diagnostic imaging*
D003287:Contrast Media