[Ultrastructure of chordoma--with special reference to physaliferous cells].
D002817:Chordoma / Q000648:ultrastructure*; D003050:Coccyx; D006801:Humans; D008297:Male; D008875:Middle Aged; D013125:Spinal Neoplasms / Q000648:ultrastructure*; D014617:Vacuoles / Q000648:ultrastructure