title: Test and teach. Number forty-three. Diagnosis: dedifferentiated chondrosarcoma.
mesh_terms: D000368:Aged; D002813:Chondrosarcoma / Q000175:diagnosis* / Q000473:pathology; D005266:Femoral Neoplasms / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008297:Male