Primary malignant tumors of bone constitute approximately 1 per cent of all types of malignant neoplasms.1 Of this 1 per cent, an extremely small proportion is made up of periosteal fibrosarcomas. Kolodny,2 in his review of the material in the Bone Registry of Sarcoma in 1928, found only a few cases. Geschickter and Copeland have stated that, among over 1,700 neoplasms involving bone, only 1.5 per cent were placed in this group. In a series of 200 primary malignant bone tumors seen at the University Hospital since 1925, comprising osteogenic sarcoma, Ewing's sarcoma, multiple myeloma and periosteal fibrosarcoma, 27 were included in the last-named group, a relatively high incidence. In every instance the diagnosis was made on the basis of a combination of clinical, operative, roentgen and histologic observations.
The age distribution in these 27 cases was, in general, that found in most cases of sarcoma.