The plan is to conduct a retrospective chart review of patients who have undergone pancreatic and liver resection by using Meditech and Epic. A non-identified database will be created after retrospectively reviewing each patient case involving pancreatic or liver resection at MDMC. The study period will start in January 2006 until December 2020. Variables will include demographics, clinical disease diagnoses, and operative parameters as well as indirect charges from the hospitalizations.