Intraosseous "chordoid" sarcoma, chondroblastic or lipoblastic origin?

An unusual sarcoma with myxoid features that apparently originated within the scapula and has been locally aggressive for 10 years is reported. Clinically and by light microscopy it was considered to be a cartilaginous tumor, possibly chordoid sarcoma. By histochemical techniques and electron microscopy it most closely resembles a tumor of brown fat.