KRT88P and cancer: As for individual cancer, serum positive rates of HBsAg in gastric, small intestinal, colonic, rectal, anal, biliary tract, and pancreatic cancers were 10.0%, 9.9%, 8.0%, 7.8%, 7.9%, 6.8%, and 6.5%, respectively, and the seroprevalence of anti‐HBc hold the largest proportion in all seven cancers.