A low-density nodular focus in the right lobe of the liver is a mass in the right lobe of the liver that is found to be lower in density than the liver tissue during an abdominal CT exam. Abdominal CT can examine disease conditions including the liver, pancreas, spleen, and other organs. Normal liver tissue has a uniform density, and when disease occurs in the liver and a mass grows that is lower than the density of liver tissue, the mass may appear as a hypodense nodular focus on imaging. Hypodense nodular foci in the right lobe of the liver can be seen in diseases such as liver abscess, liver cyst, liver cancer, liver hemangioma, etc. In these diseases, the mass contains abundant blood, fluid accumulation, etc., so the tissue density is lower than the average density of the liver. When low-density nodular foci are found in the right lobe of the liver, we can continue to improve the examination of abdominal enhanced CT, liver function, tumor markers, etc., to comprehensively determine the nature of nodules, and standardize the treatment under the guidance of professional doctors.