在正常组织的再生和修复中有大量的细胞进行有丝分裂。其中,分裂失常的细胞为机体内在的功能所破坏。近来免疫学研究指出,这是淋巴细胞和巨噬细胞的作用之一。实验和临床资料中也看出此种细胞免疫可能抑制肿瘤组织的扩展,而刺激免疫功能可提高肿瘤手术后的生存率,肺癌也是如此。细胞免疫只能在原发肿瘤和转移淋巴结切除以后才有效。已经知道许多菌毒和非细菌物质能产生免疫刺激作用,其中卡介苗的应用在动 There are a large number of cells undergoing mitosis in normal tissue regeneration and repair. Among them, the disrupted cells are destroyed by the internal functions of the body. Recent immunological studies have pointed out that this is one of the roles of lymphocytes and macrophages. Experimental and clinical data also showed that such cellular immunity may inhibit the expansion of tumor tissue, and stimulating immune function can improve the survival rate after tumor surgery, and so does lung cancer. Cellular immunity can only be effective after primary tumors and metastatic lymph node resection. It has been known that many bacterial and non-bacterial substances can produce immunostimulatory effects, of which the application of BCG is