Sacrococcygeal chordoma.
D002817:Chordoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D003050:Coccyx / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D005002:Ethiopia; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012447:Sacrum / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*