Geographic pathology of gastric dysplasia in China.

Six hundred seventeen cases of gastric dysplasia were studied morphologically and were grouped histogenetically into adenomatous, cryptal, regenerative, and globoid dysplasias. The characteristics and their relationships with various histological types of gastric carcinoma were analysed as well. Twenty-four cases of gastric dysplasia showed malignant change, which was most commonly seen in regenerative dysplasia in five high-incidence areas of gastric dysplasia in China. The causative factors of gastric dysplasia, especially regenerative dysplasia, were analysed in terms of foodstuffs and eating habits of the local inhabitants.