[The cytomorphological characteristics of the epithelial layer of the gastric and duodenal mucosa in those who worked in the cleanup of the aftermath of the accident at the Chernobyl Atomic Electric Power Station].

The complex of cytomorphological changes (dystrophy, dysregeneration, dysplasia, metaplasia) and dysfunction of gastric and duodenal mucosa epithelium were found in 79 liquidators of the Chernobyl disaster. It was shown that the reparative capability of superficial epithelium was retained. The increased number of abnormal mitoses was observed. The highest proliferative activity of duodenal epithelium reflects the intensity of reparative processes in duodenum at acute phase of peptic ulcer disease.