本世纪三十年代,有人提出肿瘤没有免疫性。六十年代以后,由于免疫学基础理论与临床实践的发展,人们对肿瘤免疫才有了新的认识。认为人体的机能状态,在肿瘤的发病学、肿瘤的发生与发展过程中占有十分重要的地位。一、恶性肿瘤的病因学(一)化学致癌因素;目前已发现1,100多种化学物质对动物与人类有致癌作用。能诱发癌症的比学物质叫做“致癌剂”。单独 In the 1930s, it was suggested that tumors were not immune. Since the 1960s, thanks to the development of immunological basic theory and clinical practice, people have had a new understanding of tumor immunity. It is believed that the functional status of the human body occupies a very important position in the pathogenesis of tumors and the occurrence and development of tumors. First, the etiology of malignant tumors (a) chemical carcinogenic factors; has been found that more than 1,100 kinds of chemical substances on animal and human carcinogenic effects. The comparative substances that can induce cancer are called “carcinogens.” alone