**The Role of the Tumor Microenvironment in the Pathogenesis of Cholangiocarcinoma**

Matthew Quinn, Matthew McMillin, Gabriel Frampton, Syeda Humayra Afroze, Li Huang and Sharon DeMorrow *Digestive Disease Research Center, Department of Internal Medicine Scott & White Hospital and Texas A&M Health Science Center Research Service, Central Texas Veterans Health Care System Temple, Texas, USA* 
