Fig. 4

Intraoperative findings. a The ileocolic vein (ICV) ran on the ventral side of the duodenum (blue arrow). b The ICV ran toward to the GCT on the ventral side of the duodenum and pancreatic head (blue arrow). c Situs after lymph node dissection. The ICV drained into the gastrocolic trunk (GCT) with the anterior superior pancreaticoduodenal vein (ASPDV), middle colic vein (MCV) and right gastroepiploic vein (RGEV)