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to 1980 was completed. Fifty-four patients underwent curative treatments and 13 were subjected to palliative treatments. The results of this retrospective studies are summarized as follows: (1) In the 54 patients of curative treatments, 3-and 5-year cumulative survival rates calculated by the actuarial method were 39.0% and 25.4%, respectively. (2) The more advanced the disease was, the lower the survival rate. (3) Of 35 deaths in the curative treatment group, the cause of death was primarydoi:10.2739/kurumemedj.29.supplement_s97 fatcat:rrltp7fl2bdqnmu3cboi2qitnq