Preoperative C-reactive protein-to-albumin ratio as a prognostic factor in biliary tract cancer: A systematic review and meta-analysis.

An elevated preoperative C-reactive protein-to-albumin ratio is significantly associated with poor prognosis in patients undergoing surgery for biliary tract cancer. The C-reactive protein-to-albumin ratio may be an independent prognostic biomarker for overall survival and recurrence-free survival in patients undergoing surgery for biliary tract cancer.