title: Ultrastructural observations of a chordoma arising in the clivus.
mesh_terms: D000328:Adult; D002817:Chordoma / Q000473:pathology*; D003388:Cranial Fossa, Posterior / Q000473:pathology; D006801:Humans; D002479:Inclusion Bodies; D008297:Male; D008854:Microscopy, Electron; D009940:Organoids; D012888:Skull Neoplasms / Q000473:pathology*