A poorly defined intrahepatic ductal structure may be associated with fatty liver, chronic hepatitis, intrahepatic bile duct stones, cirrhosis, and other conditions. The structure of intrahepatic ducts is poorly defined, and no obvious occupancy is seen in the liver, which is not specific enough to confirm which disease is being diagnosed, but the following conditions are considered possible: 1. Fatty liver, due to long-term heavy drinking, excessive obesity, metabolic syndrome, diabetes mellitus, etc., which causes a large number of liver cells to be replaced by fat cells, and ultrasound reveals that the intrahepatic ductal structure is not clear. 2. Chronic hepatitis, such as hepatitis B virus infection, chronic infection stimulation causes fibrosis of liver tissues, and the structure of intrahepatic ducts will also be unclear. 3. Intrahepatic bile duct stones, blockage of the ducts in the liver, bile stagnation, can also affect the normal structure of intrahepatic ducts. 4. Cirrhosis, diffuse fibrosis of the liver tissue, uneven density of the liver parenchyma, and loss of normal ductal structure. If you find that the structure of the ducts in the liver is not clear, further examination is recommended to confirm the diagnosis before treatment.