Goyal H, et al. – Researchers conducted a systematic review to evaluate the prognostic value of red blood cell distribution width (RDW) in acute pancreatitis (AP). Recent data demonstrated that high admission RDW can be used as a biomarker to identify the AP patients who are at high risk of mortality. Nevertheless, due to the weaknesses of available studies, further well–designed studies with large sample size and various outcome endpoints are required to rigorously assess the prognostic value of RDW in AP.