(a) Contrast-enhanced CT shows a 35-mm cystic tumor in the pancreatic tail (arrowhead) which is in contact with the splenic vein (SpV) (arrow). (b) 3D reconstruction image shows the arcade formed by the dilated LOB and MCV. (c) Schema of venous return in Case 3. The blood flows from the spleen into the PV via the LOB to the MCV and SpV.