一、胃癌的发病机制作者将胃癌依形态学分作2类:仍保留腺结构消化管特征的分化型和细胞零乱散见而不呈腺结构的未分化型。分化型胃癌的发病路程可能是个漫长的过程,即在婴幼儿期感染幽门螺杆菌(Hp),经过长年累月由慢性胃炎进展为萎缩性胃炎。随后,胃粘膜变成肠上皮样亦即出现肠 First, the pathogenesis of gastric cancer The author of the gastric cancer by morphology points for two categories: still retain the glandular structure of digestive tract differentiation characteristics and cell zero disorder see without undifferentiated glandular structure. The incidence of differentiated gastric cancer may be a long process, that is, infection of Helicobacter pylori (Hp) in infancy, after years of chronic gastritis progresses to atrophic gastritis. Subsequently, the gastric mucosa into the intestinal epithelium-like appearing intestinal