What types of malignant tumors include

In clinical practice, the classification of tumors is mainly judged based on their histological origin. Among them, malignant tumors derived from epithelial tissue are named carcinoma, tumors derived from mesenchymal tissue are called sarcomas, and there are also tumors derived from lymphoma and Malignant tumors of the hematopoietic system, including malignant lymphoma and leukemia. According to the location of the disease, they can also be divided into malignant tumors of the digestive system, respiratory system, central nervous system, reproductive system and urinary system. For most solid tumors, surgery is the main treatment principle at this stage. For leukemia, lymphoma and other malignant tumors, chemotherapy is the main treatment. For nasopharyngeal carcinoma and upper esophageal cancer, radiotherapy is the first choice.