Cystic duct carcinoma and type I/II perihilar cholangiocarcinoma: Clinicopathological features and a new differential diagnosis model.

• This article compared the clinicopathological differences between the cystic duct carcinoma and type I/II perihilar cholangiocarcinoma. • This article compared the efficacy of routine imaging examinations to distinguish between the cystic duct carcinoma and type I/II perihilar cholangiocarcinoma. • This article suggested NLR and GS as new indicators for the differential diagnosis of the cystic duct carcinoma and type I/II perihilar cholangiocarcinoma. [ABSTRACT FROM AUTHOR]