Figure 4

Anatomy and variation of superior mesenteric vessels: (a) 3D-printed model showing anterior superior pancreaticoduodenal vein (ASPDV) and right gastroepiploic vein (RGEV) converging into Henle trunk; (b) discovery during surgery, which is similar to 3D-printed model shown in (a); (c) 3D-printed model showing right colic vein (RCV) converging into ASPDV and then forming Henle trunk with RGEV; (d) discovery during surgery, which is similar to 3D-printed model shown in (c); (e) 3D-printed model showing RCV, ASPDV, and RGEV converging together into Henle trunk; and (f) discovery during surgery, which is similar to 3D-printed model shown in (e).