[Studies on mass screening for gastric cancer in remote areas of Kochi Prefecture].

Between Jan., 1975 and Jan., 1983, mass screening for gastric cancer by (vehicles) equipped with X-ray apparatus was carried out on 58,103 inhabitants over 40 years old (15.4% of the inhabitants) in Kochi Prefecture. As a result, 9,193 (12.2%) were suspected of being affected by gastroduodenal diseases. 87 of these were diagnosed as gastric cancer by endoscopic examination. Therefore, the frequency of the revelation of the gastric cancer was 0.15%. Gastric cancer was diagnosed histologically as early gastric cancer in 44.5% of the 87 patients.