1. Benign tumors are similar to the surrounding normal tissues, and the morphology and intercellular structure of tumor cells are similar to the surrounding normal cells, which are very neat and orderly when viewed with microscope. Malignant tumors are different, the tumor cells are very different from the surrounding normal cells, and the cells are large and small with disorganized structure when viewed through microscope. 2. Benign tumor grows more slowly and like a natural fence, it has a clear boundary with the surrounding normal tissues and will not destroy the inherent structure of the tissues. Malignant tumors generally grow faster and have no clear boundary with the surrounding tissues, which will damage the surrounding tissue structure. 3. Benign tumors have little effect on the body, usually grow larger and will produce pressure on the surrounding environment. Just like a big fat person coming up in a bus, people around feel more crowded, but it is still tolerable. Malignant tumors are like knife-wielding robbers who come and do bad things, which are very harmful to the surrounding people and can cause bleeding, ulceration and necrosis in the adjacent tissues. 4. This is also the most important thing, that is, metastasis. Benign tumor will not metastasize, while malignant tumor will metastasize at very early stage. Once metastasis occurs, it will bring great trouble to treatment. Even if it is cut off, it will reappear elsewhere. In fact, the benign and malignant liver tumors are artificially classified by researchers, and there is no strict boundary between the tumors themselves. Benign tumors can also develop into malignant tumors; the early stages of malignant tumors are similar to benign tumors. Some benign tumors can also cause very serious symptoms, and some malignant tumors also have a longer survival period. So, what are the benign and malignant tumors of the liver? Benign tumors are, hemangioma of the liver, mismatched tumor, hepatocellular adenoma, hepatic duct cell adenoma, and adrenal remnant tumor; malignant tumors are, hepatocellular carcinoma, cholangiocellular carcinoma, adrenal remnant carcinoma, angiosarcoma, metastatic carcinoma and metastatic sarcoma. In the liver, benign tumors are less common and malignant tumors are more common. Among benign tumors, hepatic hemangioma is common, among which cavernous hemangioma is the most common. Hemangiomas can be very small, less than 5 cm, or very large, more than 15 cm, and generally very small hepatic hemangiomas do not require treatment. Only if the hemangioma is large enough to compress the surrounding organs or if it is likely to rupture and bleed under pressure, then it needs to be removed surgically. It will not recur after removal. Among malignant tumors, the most common one is hepatocellular liver cancer, which is often referred to as liver cancer. Sun Yat-sen, Jiao Yulu, all died because of liver cancer. The most common symptom of liver cancer is pain in the area of the liver. In the film of Jiao Yulu, it is often seen that Secretary Jiao used the corner of the table against the liver area because of pain. Other symptoms include inability to eat, unexplained weight loss, diarrhea, abdominal pain, etc.