Patchy abnormal high density shadow in the left lobe of the liver, isodense shadow in portal phase and equilibrium phase, commonly seen in schistosomiasis, cirrhotic nodules, calcified foci of cholangiocellular carcinoma. 1. Schistosomiasis: Chronic and advanced schistosomiasis may have intrahepatic calcification, and in the advanced stage, there are liver atrophy, unevenness and nodular protrusion, and the proportion of right and left liver lobes is out of proportion, but the most characteristic is the presence of lineal hyperdense shadow. The most characteristic feature is the presence of linear hyperdense shadows in the liver parenchyma in varying amounts. Generally, the portal phase and equilibrium phase show isodense shadows. 2. Cirrhotic nodules: typical cirrhotic nodules are high-density nodular shadows on plain scanning, with no enhancement in arterial stage, while the density of the whole liver tends to be uniform and consistent without nodularity in portal stage. 3. Calcified foci of cholangiocellular carcinoma: irregular punctate or patchy calcification can be seen in some foci of cholangiocellular carcinoma, which are numerous and small, with high density and irregular shape. 4. In addition to the above, when calcification occurs in fibrolamellar hepatocellular carcinoma, it is mostly punctate or rounded with high density, and isodense in portal and equilibrium phases. The above examination results alone cannot determine the cause accurately, but need to be combined with the characteristics of medical history and other examination results to make accurate judgment, and it is recommended to clarify the cause of the disease under the guidance of doctors.