抄録
1) The successively subcutaneously transplanted osteogenic sarcoma, which was produced experimentally and forming little or no bone and which seemingly appeared as polymorphic cellor fibro-sarcoma, showed evident osteoid formation in the 13th generation of transplantation.
2) An evident osteoplastic sarcoma developed when a non-osteoplastic sarcoma of the same origin as the above-mentioned tumor was transplanted into the medullary cavity of a Wister rat.
3) Based on the two experiments it was clarified that a sarcoma originating from the bone possesses latent capacity for osteoplasia even if it seemingly has lost osteoplastic ability during successive transplantations, and can develope into an osteoplastic sarcoma under certain circumstances. Definite bone formation of the sarcoma was found when the non-osteoplastic osteogenic sarcoma was transplanted into the intramedullary cavity of the bone.
