Evaluation of mean platelet volume as a diagnostic biomarker in acute appendicitis.

BACKGROUND: Diagnosis of acute appendicitis remains to be challenging with up to 30% negative exploration rates. In addition to careful clinical history and physical examination, we still need easily applicable, cheap and effective biomarker. PATIENTS AND METHODS: A retrospective case-controlled study was designed in two groups, both containing 100 patients, acute appendicitis and control. Leukocyte count, neutrophil percentage, platelet count and meal platelet volume (MPV) were compared. RESULTS: MPV values for acute appendicitis and control groups were 7.4 ± 0.9 fL (5.6-10.6) and 9.1 ± 1.6 fL (5.1-13.1). For the diagnosis of acute appendicitis, ROC analysis revealed 74% sensitivity and 75% specificity for a cut-off value of 7.95 fL of MPV, however, the diagnostic value of leukocyte count and/or neutrophil ratio was superior. CONCLUSION: Our results suggest that, MPV value is an important parameter in the diagnosis of acute appendicitis, but in terms of sensitivity and specificity, leukocyte count and/or neutrophil percentage is superior.