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为探讨药物流产后阴道出血和子宫内膜中胎盘残留组织的关系，用组织病理学和免疫细胞化学方法，对药物流产后刮出组织（２０例）和正常流出组织（１０例）进行了研究。组织病理学显示：刮出内膜组织中都含有残留蜕膜组织，后者多数蜕膜细胞变性坏死，蜕膜和内膜都有大量炎性细胞浸润，并具有不同步发育的腺体和间质。免疫细胞化学方法显示：正常流出或刮出组织的毛细血管内皮因子Ⅷ相关抗原和胎盘碱性磷酸酶（ＰＡＬＰ）呈阳性反应。残留的蜕膜组织中可见结构和功能正常的毛细血管。提示：子宫内膜中的炎细胞浸润，内膜不同步发育，残留蜕膜的某些部位因正常血液供应而继续生长，可能是药物流产后出血的原因。
To investigate the relationship between vaginal bleeding after medical abortion and placental residual tissue in the endometrium, the histopathology and immunocytochemistry were used to study the tissue scraping (20 cases) and normal outflow tissue (10 cases) after medical abortion . Histopathology showed that all of the scraped endometrial tissues contained residual decidual tissue, the majority of which decidual cells degeneration and necrosis, decidual and endometrial have a large number of inflammatory cell infiltration, and with asynchronous development of the gland and between quality. Immunocytochemistry showed that the capillary endothelium factor Ⅷ related antigen and placental alkaline phosphatase (PALP) were positive in normal outflow or scraped tissues. Residual decidual tissue visible structure and function of normal capillaries. Tip: Inflammatory cells in the endometrium infiltration, endometrial development is not synchronized, some parts of residual decidua due to normal blood supply and continue to grow, may be the cause of bleeding after medical abortion.