Aim: The study’s aim is to evaluate mean platelet volume (MPV) as a marker of inflammation in patients
 with acute pancreatitis (AP) and to analyse the relationships among MPV, CRP (C-reactive protein) and
 Ranson’s score.
 Material and Methods: In this study, 119 patients with AP (mean age 53.8 ± 18.0 years) and 88 healthy
 control group (mean age 53.1 ± 6.8 years) were enrolled. Among the patients with AP, 75 were classified
 as having biliary AP, and 44 were classified as having nonbiliary AP. All patients’ demographic data,
 clinical and laboratory findings and Ranson’s scores were examined from the hospital’s database.
 Results: MPV was significantly lower among patients with AP than among the control group (p = 0.001).
 CRP was significantly higher among patients with AP than among the control group (p< 0.001). The
 difference in MPV between the biliary and nonbiliary AP group was statistically not significant. When
 we compared MPV based on patients’ lengths of hospital stay, there was no significant difference. In
 correlation analysis, there was no correlation among CRP, Ranson’s score and serum MPV levels.
 Conclusion: We observed that MPV levels in the AP group were lower than healthy controls. Thus, like
 other inflammation markers, MPV might be a useful marker for AP diagnosis.