Cancer is a type of tumor and generally belongs to malignant tumors. Tumors are mainly classified into benign tumors and malignant tumors according to the nature of the pathology. The vast majority of malignant tumors are cancers, that is, malignant tumors originating from epithelial tissues or malignant tumors originating from mesenchymal tissues, such as sarcomas, or malignant tumors of the hematopoietic system, such as leukemia. Cancer can be manifested as lumps, hard texture, broken surface, repeated non-healing or symptoms such as pressure pain, fever and bleeding, etc. The treatment of cancer is mainly surgical radical treatment, and the nature and stage of cancer can be determined through surgical radical treatment and post-operative pathological examination.