本实验观察到小鼠屏蔽两后肢10Gy照射后21和30天,在小肠壁粘膜固有层出现了髓外造血,以十二指肠粘膜最为常见,其次为回肠,空肠粘膜内则未见到.其主要表现是在固有层见到红系、粒系和红粒混合等三种造血灶.文中对照射后小肠壁粘膜出现髓外造血的时间、分布及其发生机理进行了讨论. In this experiment, we observed that extramedullary hematopoiesis occurred in the lamina propria of the small intestine at 21 and 30 days after the mice were shielded by 10 Gy of both hind limbs. The duodenal mucosa was most common, followed by the ileum, but not within the jejunal mucosa. The main manifestation is that the hematopoietic foci of erythroid, granulocyte and red granule are seen in the lamina propria.In the paper, the time, distribution and mechanism of extramedullary hematopoiesis in the intestinal mucosa after irradiation are discussed.