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One hundred seventy four gastric cancer patients admitted to our department from 1956 to 1959. The cases surviving over 5 years were 19 patients and the 5-year survival rate in our department was 26.0%. It is not satisfactory to us considering the up-to-date progress in medical science. Between CAT., SAT., and INF. of the new Japanese classification on gastric carcinoma and prognosis, there is found a remarkable correlotion by this survey. Also, there is a close relation between prognosis and lymphnode conditions during operation, carcinoma infiltration state into the stomach wall. We should have many data before the operation to consider and compare with the post-operation data.

One hundred seventy four gastric cancer patients admitted to our department from 1956 to 1959. The cases surviving over 5 years were 19 patients and the 5-year survival rate in our department was 26.0%. It is not satisfactory to us considering the up-to-date progress in medical science. Between CAT., SAT., and INF. of the new Japanese classification on gastric carcinoma and prognosis, there is found a remarkable correlotion by this survey. Also, there is a close relation between prognosis and lymphnode conditions during operation, carcinoma infiltration state into the stomach wall. We should have many data before the operation to consider and compare with the post-operation data.

In twenty-eight gastric cancer cases the MLTC was performed. X-ray-irra­diated tumor cells or MMC-treated tumor cells were cultured with autologous lymphocytes and with 3H-thymidine added. In the autoradiography group 2 out of 8 cases and in the liquid scintillation counter group 3 out of 20 cases the uptake of 3H-thymidine by the cells increased more than in the controls. In observing the results of the 1st and 2nd culture in the autoradiography group, and effect of lymphocyte reactivity following the surgical removal of the tumors was observed.