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Different HCl and pepsinogen I secretion patterns in anatomically defined gastric ulcer subsets.

Anatomically, functionally, and clinically, peptic ulcer patients are a heterogeneous group of subjects. These patients can be classified according to the anatomic localization of the niche. The functional state of the gastric mucosa was studied in 30 gastric ulcer patients, 25 duodenal ulcer patients, and 10 normal controls. The classification of the first group was based on Johnson's criteria, with the following results: 10 individuals were type I, 10 were type II, and 10 were type III. Pepsinogen I levels and gastric acid secretion were measured in all 65 subjects under basal conditions and after subcutaneous pentagastrin stimulation. Both basal and stimulated serum pepsinogen I values were significantly higher (p less than 0.05) in gastric ulcer type III patients than in the other four groups. These values in gastric ulcer type I were similar to those of the controls. Gastric ulcer type II patients showed an intermediate functional state similar to that of duodenal ulcer patients. In both gastric ulcer type II and duodenal ulcer patients, the basal and stimulated pepsinogen I levels were significantly higher (p less than 0.05) than those found in controls, whereas the basal serum gastrin levels were similar in the five groups. In conclusion, different HCl and pepsinogen I secretory patterns, with functional heterogenicity of the gastric mucosa, are shown here for the anatomically defined gastric ulcer subsets.