part of part of tributary of tributary of vessel drains blood from abdomen head of pancreas hepatic portal vein duodenum superior pancreaticoduodenal vein vein of abdomen posterior superior pancreaticoduodenal vein 2025-05-14T14:34:54Z A vein that is a tributary of the hepatic portal vein. It drains the dorsal surface of the distal first and second portion of the duodenum and the dorsal surface of the pancreatic head.