Association between hepatitis C and B viruses and head and neck squamous cell carcinoma.

Abstract Background Hepatitis B and C viruses are known to be carcinogenic and have been associated with the development of non-Hodgkin’s lymphoma as well as hepatocellular carcinoma. The incidence of head and neck cancer is increasing worldwide, and early diagnosis is vital in order to achieve good oncological outcomes. Objectives To investigate the association between chronic hepatitis B and C infection, and head and neck squamous cell carcinoma (HNSCC). Study design We performed a retrospective case control study with 774 head and neck squamous cell carcinoma (HNSCC) patients undergoing treatment, and 1518 cancer-free controls undergoing hernia surgery. Hepatitis B and C serologies were tested prior to treatment, and cases and controls were age- and sex-matched before analysing rates of infection. Results HNSCC patients were more likely than controls to have evidence of chronic hepatitis B (OR = 2.76; CI 95 %, 1.64–4.64) and hepatitis C (OR = 2.59; 95 % CI, 1.46–4.60) infection. No substantial association was found between hepatitis B and C infection and other known risk factors for head and neck cancer. Conclusions These findings suggest a positive association between both hepatitis B and hepatitis C chronic infection, and HNSCC. More work is needed to establish a causal role, however an awareness of the possibility of increased risk of HNSCC may lead to earlier diagnosis and better outcomes in patients with hepatitis B and C.