SCLEROSING SARCOMA OF BONE

In the older literature, both pathologic and surgical, sarcomas of bone were usually divided into the central and the periosteal type. The central type was frequently referred to as telangiectatic because of its hemorrhagic appearance on macroscopic examination and the absence of any clearly defined picture on microscopic examination. Tumors which are now referred to as osteolytic sarcoma, small round cell sarcoma of bone (Ewing's tumor) and central chondrosarcoma were also considered to be of this type. According to the older classification, periosteal sarcoma likewise had no well defined histologic characteristics. The fibrocellular forms, now recognized as either fascial sarcoma, or sarcoma arising from the nerve sheath and secondarily involving bone, and chondrosarcoma, which in the early stage is mostly subperiosteal and outside of the cortical bone, were classified under the periosteal type. Sclerosing sarcoma, which develops from the periosteum and cortical bone, usually at the ends of the long