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胃癌早期病例之增加和高龄(70岁以上)手术病例之增多(占10%)为日本近年来胃癌外科治疗中的明显特点。自1946～1970的25年中,日本癌研究会附属医院外科施行胃癌开腹手术4,988例,根治切除率69%(46～50年55%,66～70年77%)。根治切除病例的5年生存率为49%(表浅癌90.4%,进展期癌41.8%),10年生存率为36%。早期癌在根治切除病例中的比例:46～55年为0.5～4.2%,56～60年为8.3%,61～70年为19.2～28.8%,71～74年为37.9%,即
The increase in early cases of gastric cancer and the increase in the number of elderly patients (over 70 years of age) (accounting for 10%) are the obvious features of surgical treatment of gastric cancer in Japan in recent years. During the 25 years from 1946 to 1970, the Japanese Society for Cancer Research underwent surgery for 4,988 cases of gastric cancer, and the radical resection rate was 69% (55% in 46-50 years and 77% in 66-70 years). The 5-year survival rate for radical resection was 49% (90.4% for superficial cancers and 41.8% for advanced cancers), and the 10-year survival rate was 36%. The proportion of early cancers in radical resection cases ranges from 0.5 to 4.2% in 46 to 55 years, 8.3% in 56 to 60 years, 19.2 to 28.8% in 61 to 70 years, and 37.9% in 71 to 74 years.