The left branch of the portal vein is the leftward branch of the main portal vein. Truncation of the left branch of portal vein is caused by tumor compression or invasion, which makes the left branch of portal vein not obvious on imaging, resulting in the so-called “truncation”.
This condition is usually seen in liver cancer cases, in which tumor cells tend to invade the intrahepatic vascular system, especially the hepatic portal vein system, and form portal vein thrombosis (PVTT). Its incidence is 44.0%~62.2. PVTT occurs in liver cancer, and clinical manifestations such as intra- and extra-hepatic metastasis, portal hypertension, jaundice, and ascites occur within a short period of time.
Once the left branch of portal vein is truncated, it is necessary to seek medical treatment as soon as possible, complete relevant examinations, make a clear diagnosis, and then carry out standardized treatment to avoid delaying the condition.