CXCL13 and neoplasm: Considering the lack of serum-based markers in the context of BTC, we evaluated circulating levels of CXCL1, CXCL10 and CXCL13 in a large cohort of BTC patients undergoing tumor resection between 2011 and 2017, with the aim to analyze their potential as diagnostic and prognostic markers in these patients.