HBsAg or anti-HBc positivity have been demonstrated to be risk factors for extrahepatic cancers, such as gastric cancer 10, nasopharyngeal carcinoma 9, pancreatic cancer 26, biliary tract cancer 11, colorectal cancer, kidney cancer, ovarian cancer, and non-Hodgkin's lymphoma 12. This evidence concerns the gene KRT88P and kidney cancer.