1. Mesenchymal chondrosarcoma is an unusual tumor which has a characteristic morphological appearance. The neoplasm arises mostly from the flat bones and frequently metastasizes, sometimes after a lapse of many years.
2. Of particular interest is the report of two examples in which the tumor arose in extra-osseous tissues.
3. Radical surgical removal is the treatment of choice because of the tendency of the neoplasm to recur locally and to metastasize.
Copyright 1964 by The Journal of Bone and Joint Surgery, Incorporated