At present, clinically, tumors are divided into two categories: benign tumors and malignant tumors, and the criteria for determining the two are mainly divided into the following two aspects: 1. The fundamental criterion for determining the two lies in the degree of differentiation and maturation of tumors, that is, the pathological histological results of tumors. Benign tumors generally grow slowly, rarely metastasize, and have less influence on the whole body, only a few huge benign tumors can produce local pressure symptoms. On the other hand, malignant tumors grow rapidly and are prone to metastasis and have more serious effects on the whole body. Some malignant tumors can cause anemia, weakness and systemic failure in advanced stages.