The portal vein, or hepatic portal vein, is the main blood vessel of the portal venous system (PVS), which delivers blood to the liver from the stomach, intestines, spleen, gallbladder, and pancreas.
Certain white blood cells — histiocytes and lymphocytes — attack your other blood cells. These abnormal blood cells collect in your spleen and liver, causing these organs to enlarge. High levels of a ...