机体发生肿瘤的机理,有多种学说。目前从免疫监视学说进行研究较多。OStutman等用无胸腺鼠进行实验,证实无胸腺鼠对化学致癌物质的敏感性,并不比有胸腺鼠高。我们实验中发现,不长瘤雌鼠和长瘤雌鼠的胸腺大小相似。又有人报导某些肿瘤可以产生异位激素ACTH,我们用Cortison注射小白鼠,胸腺脾脏明显萎缩,抑瘤率高达60.12％。这些事实提示,肿瘤对机体的影响是复杂的,它能 There are many doctrines about the mechanism of tumors in the body. At present, more studies are conducted from the immunosurveillance theory. OStutman et al. performed experiments with athymic mice and confirmed that the sensitivity of athymic mice to chemical carcinogens was no higher than that of thymus mice. In our experiments, we found that the size of the thymus in the tumor-free and tumor-bearing female mice was similar. It was also reported that certain tumors can produce the heterotopic hormone ACTH. We used Cortison to inject mice, and the thymus spleen significantly shrank. The tumor inhibition rate was as high as 60.12%. These facts suggest that the impact of the tumor on the body is complex and it can