At present, clinical diagnosis of hepatocellular carcinoma is not made by judging the size of right lobe of liver occupancy, but by performing tissue puncture and pathological biopsy and finding cancer cells under microscope. Occupation of right lobe of liver refers to the abnormal proliferation of tissues in the right lobe of liver of a patient, but the size of the occupation cannot accurately help doctors to judge the nature of the occupation of the patient, such as the occupation of a large area and irregular shape, it is mostly considered that the probability of malignant tumors is high, but it cannot be diagnosed conclusively. At present, the gold standard for diagnosing liver cancer is the clear finding of cancer cells in the relevant occupying tissue section of the patient. Tumors can be divided into benign and malignant tumors, and cancer is one kind of malignant disease; the occupying space in the right lobe of the liver may also be liver cysts, etc. Patients can actively cooperate with doctors to complete further examination, and then carry out treatment in a timely manner after the nature of the occupying space has been clarified.