[Pathological study of histogenesis and development of early gastric cancer].
D000230:Adenocarcinoma / Q000473:pathology*; D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D013272:Stomach Diseases / Q000473:pathology; D013274:Stomach Neoplasms / Q000473:pathology*