恶性肿瘤对人类生命和健康危害极大。1973～1977年我国人口的主要死亡原因统计结果表明,在各类死因中男性恶性肿瘤死亡仅次于呼吸系病,列为第二位死因,女性仅次于呼吸系病和冠状动脉粥样硬化性心脏病以外的其它心血管病,成为第三位死因我国每年因恶性肿瘤死亡约70万人,其中胃癌16万多,食管癌15.7万,肝癌10万,这是我国人口死亡最多的三种恶性肿瘤。仅这三种癌的死亡人数就占我国全部癌症死亡人数的半数以上(59.6％)。因此,重点研究消化系统恶性肿瘤的防治非常迫切和必要。众所周知,消化系统恶性肿瘤,特别是癌,对放射治疗和化学治疗不敏感,当前唯一的根治手段是手 Malignant tumors are extremely harmful to human life and health. The statistical results of the leading cause of death in China from 1973 to 1977 showed that male deaths from malignant tumors were second only to respiratory diseases in all causes of death, and were ranked as the second cause of death. Women were second only to respiratory diseases and coronary atherosclerosis. Other cardiovascular diseases other than heart disease have become the third cause of death. About 700,000 people die from malignancy each year in China, including more than 160,000 stomach cancers, 157,000 esophageal cancers, and 100,000 liver cancers. This is the three most common deaths in China. Malignant tumors. Only the deaths of these three types of cancer accounted for more than half (59.6%) of all cancer deaths in China. Therefore, it is very urgent and necessary to focus on the prevention and treatment of malignant tumors of the digestive system. It is well known that malignant tumors of the digestive system, especially cancer, are insensitive to radiation therapy and chemotherapy, and the only radical cure is the current