Metabolic syndrome and the risk of cholangiocarcinoma: a hospital-based case–control study in China

Background Metabolic syndrome is regarded as a risk factor for hepatocellular carcinoma. However, no research has been conducted to investigate the association between metabolic syndrome and cholangiocarcinoma (CCA), especially in the Chinese population. Herein, a hospital-based case–control study was carried out in China to explore the association between metabolic syndrome and CCA risk.