From the reports in the literatures of Japan, we collected and analized 201 cases of primary sarcoma of the large bowel, and studied the treatment and prognosis of cases (43.80/.). Compared with carcinoma, the prognosis of sarcoma is worse and many patients die in one month following the operation. The reason of poor prognosis is probably due to the difficulty of early diagnosis. Postoperative 12 cases (6.0% of 201 collected cases) are alive for 5 years or more, which are 6 myosarcomas, 2 fibrosarcomas, 2 reticulosarcomas, one lymphosarcoma and one melanosarcoma.
Advancement and prognosis of tumor is so strongly influenced by the histologic pattern of sarcoma as followings. i. e. Reticulosarcoma and lymphosarcoma metastase early to regional lymphnodes and liver, and recurrence occures sometimes within about one year after operation. Myosarcoma has the tendency of hematogeneous metastasis and the prognosis is better than the others, but some cases expired with the local recurrence after 3 years or more. About melanosarcoma, distant organs are affected by metastasis and its prognosis is poor because of being sometimes resected as " hemorrhoid ".
Radical operation is the first choice for treatment, although chemotherapy and irradiation must be used only as supplemental method.
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