Serum pepsinogen I and gastrin in relation to extent and location of intestinal metaplasia in the surgically resected stomach.

A study of 177 patients undergoing distal subtotal gastrectomy indicates that a preoperative serum pepsinogen I (PGI) level below 20 ng/ml predicts the presence of gastic carcinoma and the degree of intestinal metaplasia of the gastric antrum. The serum gastrin level was not predictive of carcinoma or of the degree of intestinal metaplasia. Of the 15 patients with a low serum PG level, 13 had carcinoma and 2 had atypical polyps. The PG I level in a stored serum sample from 4 of 30 patients fell from normal to abnormal over a period of 8-9 years. Each of these converters had invasive carcinoma of the stomach. This suggests that persons showing a fall in serum PG I to abnormal levels during serial analyses should be evaluated for the possibility of gastric carcinoma.