Chondrosarcoma and osteosarcoma of the jaws in the same patient.

A 13-year-old girl was treated with a combination of surgery and radiation for a maxillary chondrosarcoma. Four and one half years later, at the age of 17, she was diagnosed as having an osteosarcoma of the ipsilateral mandible. A recurrence in the contralateral mandible necessitated its removal 5 1/2 years later. Eighteen months following the last procedure the patient is well, industrious, and has had no apparent recurrence.