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青海和上海是胃癌高发区。青海局限型胃癌４１．０％，其中高分化癌占４４．３％，上海局限型胃癌９２．８％，高分化癌占４５．１％；浸润型生长的胃癌青海为５８．９％，其中低分化癌占５４．６％；上海浸润型胃癌７．１％，其中低分化癌占４３．６％，青海和上海胃癌的大体类型有显著差异（Ｐ＜０．００５）。胃癌侵犯胃壁深度与全国资料比较，青海胃癌在浅深肌层者５１．９％，显著高于全国资料８．５％（Ｐ＜０．００５），浆膜／进浆膜层癌全国资料为９０．８％，青海为４８．１％，有非常显著差异（Ｐ＜０．００５）。青海３７０例进展期胃癌第一站淋巴结转移卒７２．１％，器官扩散大网膜为２８．６％，肝２５．１％，结肠１５．４％，胰腺１４．１％，十二指肠７．５％。全国资料第一站淋巴结转移７４．４％，大网膜转移２７．５％，肝３８．１％，胰腺１８．１％，十二指肠１０．８％，淋巴转移和器官扩散均高于青海。
Qinghai and Shanghai are high incidence of gastric cancer. In 41.0% of the localized gastric cancers in Qinghai, 44.3% in well-differentiated cancers, 92.8% in locally-limited gastric cancers and 45.1% in well-differentiated cancers in Shanghai and 58.9% in invasive-growth gastric cancers Poorly differentiated cancer accounted for 54.6%; Shanghai invasive gastric cancer 7.1%, of which poorly differentiated cancer accounted for 43.6%, the general type of gastric cancer in Qinghai and Shanghai were significantly different (P <0.005). Gastric cancer invasion of gastric wall depth compared with the national data, Qinghai gastric cancer in shallow myopia 51.9%, significantly higher than the national data 8.5% (P <0.005), serosal serosa into the national data for 90.8% in Qinghai and 48.1% in Qinghai (P <0.005). In 370 cases of advanced gastric cancer in Qinghai, 72.1% died of lymph node metastasis in the first stage, 28.6% in organ diffuse omentum, 25.1% in liver, 15.4% in colon, 14.1% in pancreas and duodenum 7.5%. National data of the first station lymph node metastasis 74.4%, omentum 27.5%, liver 38.1%, pancreas 18.1%, duodenum 10.8%, lymphatic metastasis and organ spread were higher than Qinghai.