Hepatic occupancies are essentially abnormal echogenic areas on ultrasound, abnormal CT density, or (and) abnormal magnetic resonance signals. Multiple occupancies in the liver are ultrasound examinations that appear to have abnormal echogenicity within the liver and may be caused by malignancy or hepatic hemangioma, for example. If multiple occupancies in the liver appear to have specific echogenicity on examination, cancer may be considered and further investigation is needed. It may be caused by malignant tumor or hepatic vascular tumor, etc. If there is a history of hepatitis B, hepatitis C or cirrhosis and there is a liver occupancy on clinical examination, it is likely to be a primary liver cancer. However, further definitive diagnosis by enhanced CT, MRI and methemoglobin (tumor marker) is needed. In individuals without a background of hepatitis, the main hepatic occupying lesions are hemangiomas and liver cysts. Women on long-term oral contraceptives may also have hepatic adenomas, which are less likely to become cancerous, even less than 1% of the time. In addition, for patients with clinical colorectal cancer, there is a 20-30% probability of metastatic cancer if the imaging of the liver mass is demonstrated.