RESUMEN
Gastric carcinoma continues to dominate as a leading cancer in common 5 types of cancer in Mongolia. Abroad studies showed that proximal gastric carcinomas were associated w ith non-neoplastic histologic changes (cells with ciliated metaplasia, large and small vacuoles, intramucosal glandular cysts, and intestinal metaplasia) in the gastric mucosa. RESULTS Of the specimens with cardia carcinoma seen (n=30) 63.3% contained intestinal metaplasia. 46.6% ciliated metaplastic cells, 15.0% large vacuolated cells, 13.3% small vacuolated cells, 53.3% intramucosal cysts. CONCLUSIONS The study shows that higher prevalence of the ciliated metaplasia among Mongol patients with gastric carcinoma than among European. The possibility of these changes might be evoked by environmental and genetic factors both in Mongolia.