Chordoma of the clivus. A report of four cases.
D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000000981:diagnostic imaging*; D002533:Cerebral Angiography; D014695:Cerebral Ventriculography; D002817:Chordoma / Q000175:diagnosis* / Q000000981:diagnostic imaging* / Q000601:surgery; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009192:Myelography; D011379:Prognosis; D014054:Tomography