C-reactive Protein Is the Best Biomarker to Predict Advanced Acute Cholecystitis and Conversion to Open Surgery. A Prospective Cohort Study of 556 Cases

Background White blood cell levels (WBC) is the only biologic determinant criterion of the severity assessment of acute cholecystitis (AC) in the revised Tokyo Guidelines 2018 (TG18). The aims of this study were to evaluate the discriminative powers of common inflammatory markers (neutrophil-to-lymphocyte ratio (NLR), and C-reactive protein (CRP)) compared with WBC for the severity of AC, and the risk for conversion to open surgery and to determine their diagnostic cutoff levels.