Ischemic complications after pancreatic surgery can raise postoperative mortality from 4 to 83 per cent. Variants in vascular anatomy play a major role in determining such complications, but they have been only occasionally reported in the literature. We retrospectively analyzed 100 records of patients consecutively treated between January 2011 and December 2013 for resectable malignant diseases who underwent pancreaticoduodenectomy (PD) or total pancreatectomy to state the statistical impact of anatomical vascular variations in surgical outcomes (mean surgical timing, mean blood loss during surgery, and postoperative major complications onset) and to state whether preoperatively undetected vascular anomalies (VA) can raise the risk of postoperative ischemic complications. PD was performed in 89 patients, requiring multiorgan resections in three cases and total pancreatectomy was performed in 11 cases, which was associated to splenectomy in four patients. Incidence of VA was 25/100 (25%), whereas in 18/25 cases (72%) they were detected by preoperative radiologic setting. Their presence in patients undergoing PD significantly raised mean surgical timing (P = 0.003) and increased mean blood loss (P < 0.0001). Preoperatively undetected VA resulted in a major risk of postoperative acute liver ischemia (P = 0.008). Celiacomesenteric aberrant anatomy was proven to be related to an increased risk of intraoperative complications. If undetected preoperatively, they can be associated with anastomotic complications and liver failure. Maximal efforts must be done to detect and to preserve vascular anatomy of celiacomesenteric district.