日本血吸虫在人肠系膜血管内寄生,虫卵沉积于肝脏与胃肠壁内,异物长期刺激组织,造成慢性病变。有人认为,慢性血吸虫病可引起这些器官的癌变,但是许多作者则持反对意见。扬中县为血吸虫病流行区,同时又是胃癌、肝癌、肠癌高发县、两者之间是否存在某种联系?本文用流行病学方法对这个问题作如下探讨。 Schistosoma japonicum is parasitized in the human mesenteric blood vessels, and eggs are deposited in the liver and the gastrointestinal wall. Foreign bodies stimulate tissues for a long time, causing chronic lesions. Some people think that chronic schistosomiasis can cause cancer in these organs, but many authors object. Yangzhong County is an endemic region of schistosomiasis, and is also a link between gastric cancer, liver cancer, high incidence of bowel cancer, and whether there is a certain link between them? This article discusses this issue with epidemiological methods as follows.