[Gastric cancer screening using ABC classification].

It is considered that Helicobacter pylori (Hp) infection is a requirement of the gastric cancer development, and that the atrophy of gastric mucosa is a high risk group of gastric cancer among Hp infected people. We can judge a super low risk group as well as a high risk group of the gastric cancer using the ABC classification by concomitant measurement of serum pepsinogen and serum Hp antibodies. We expect that the ABC classification contributes in population-based screening of gastric cancer. We can decide the method and the distance of the imaging examination by the ABC classification. However, it is necessary to use the ABC classification appropriately.