Parzefall, J.; Girotti, P.; Weigl, M. P.; Hanewald, L.; Konigsrainer, I. Whipple Procedure in a Patient With Duplicated Portal Vein and Other Major Abnormalities in Vascular Anatomy of the Upper Abdomen – A Case Report of a Rare Finding. Arch Case Rep 2025, 9, 366-369.