Sacrococcygeal chordoma.
D000328:Adult; D000368:Aged; D002817:Chordoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D010146:Pain / Q000209:etiology; D010384:Pelvic Bones / Q000000981:diagnostic imaging; D011859:Radiography; D012445:Sacrococcygeal Region