Serum soluble Fas levels and incidence of biliary tract cancer in a nested case-control study.
BACKGROUND Soluble Fas (sFas) plays multiple roles in tumorigenesis and cancer dissemination by avoiding apoptosis via connection to Fas ligand. We assessed associations of serum sFas levels with the incidence of extrahepatic biliary tract cancer (eBTC) in a prospective case-control study nested in the Japan Collaborat...