Chordoma.
D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy; D002817:Chordoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000628:therapy; D006801:Humans; D009777:Occipital Bone; D011379:Prognosis; D011859:Radiography; D012445:Sacrococcygeal Region; D012888:Skull Neoplasms; D013100:Sphenoid Bone; D013125:Spinal Neoplasms