The liver is normal in size, and the parenchymal echogenicity is dense and the luminal structure is clear, which is considered to be caused by impaired liver function, such as fatty liver and drug hepatitis. 1. Fatty liver: ultrasonic examination of the liver parenchymal echogenic dense luminal structure with a clear walk suggests that the liver’s tissue structure is abnormal, if it is a diffuse change, it is mainly considered to have fatty liver, in general, if the fat content of the liver is more than 40%, it will be manifested as a dense echogenicity under ultrasonic examination. 2. Drug hepatitis: if the ultrasound examination finds that the echogenicity of the liver is dense and the lumen structure is clear, it may be caused by impaired liver function and drug hepatitis, such as patients with tuberculosis, taking anti-tuberculosis drugs for many years, which leads to the deposition of fat in the liver cell membranes, and thus the echogenicity of the situation. It is recommended that when the ultrasound examination shows that the liver parenchyma echogenicity dense tubular structure walks clearly, should also continue to improve other related examination, clear the nature of liver lesions, and actively cooperate with the doctor for standardized treatment.