[Ultrastructural study on cartilage tumors in man].
D000818:Animals; D002357:Cartilage Diseases / Q000473:pathology*; D002804:Chondroblastoma / Q000648:ultrastructure*; D002812:Chondroma / Q000648:ultrastructure*; D002813:Chondrosarcoma / Q000648:ultrastructure*; D006801:Humans; D008854:Microscopy, Electron; D011817:Rabbits