The differences between malignant tumor and cancer are mainly in the following aspects: 1. Malignant tumor has a broader scope, including sarcoma and carcinoma, while carcinoma refers to malignant tumor of epithelial tissue origin. 2. There are also differences in clinical manifestations and biological behaviors between the two, among which sarcoma grows faster, tumor is generally softer in texture and is prone to bloodstream metastasis. 3. In contrast, cancer is harder and slower than sarcoma, and it is prone to lymphatic tract metastasis, and only in advanced stages will bloodstream metastasis occur. 3. There are also differences in the treatment methods between the two, as sarcoma in advanced stages of malignant tumors is not sensitive to radiotherapy and chemotherapy, so there are fewer treatment methods. Patients with advanced cancer can also fight against tumor through chemotherapy, targeted therapy and other comprehensive treatment means of internal medicine.