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Distribution of four cases of gastric cancer in subjects with mild atrophic gastritis. The white lesions are differentiated, and the grey lesions are undifferentiated. Two of the four cases could not be detected by serum pepsinogen (PG) screening using a serum PG I concentration of less than 70 ng/ml and a I:II ratio of less than 3.0 as the cut off point. B-4, Borrmann type 4. Borderline, borderline between fundic and pyloric regions.
