“…As an inflammatory process, acute pancreatitis results in excessive innate immune system activation and consequent release of pro-inflammatory mediators such as IL-6, IL-8, and TNF-α [5]. While the involvement of lymphocytes in this process has been partially explored through previous studies, the specific impact of alterations in peripheral lymphocyte subsets on Diseases 2024, 12, 18 2 of 15 prognostic accuracy, disease management, and hospitalization duration for patients with AP remains unclear [6,7]. Even though acute pancreatitis is a disease with high costs for the health care system, few studies have tried to relate the prediction of severity and length of hospital stay.…”