title: Nasopharyngeal chordoma.
mesh_terms: D001706:Biopsy; D002817:Chordoma / Q000175:diagnosis / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000000981:diagnostic imaging; D009305:Nasopharynx / Q000473:pathology; D011859:Radiography; D014054:Tomography