[Morphological characteristics of hyperplastic and adenomatous stomach polyps].

A morphological study of biopsy samples of gastric polyps from 224 patients was carried out. Four stages in gastric polyp morphogenesis were distinguished: foveolar hyperplasia, hyperplastic polyp, "two-floor" adenoma and adenoma. The correlation was established between the degree of Helicobacter pylori infection in the polyp mucous membrane on the one hand, and epithelial and stromal reactions (immuno-inflammatory reaction of stroma, chronic inflammation, formation of Russel bodies, cystes and chronic erosions) on the other. Greater content of stromal collagens, type IV collagen in case of gastric hyperplastic lesions was observed. Appearance and progression of gastric adenomatous growth in hyperplastic polyp correlates with an increase of type III collagen content, decrease of types I, IV, V collagens and fibronectin.