Case-control study of cutaneous human papillomavirus infection in Basal cell carcinoma of the skin.

Genus-β human papillomavirus (HPV) DNA has been detected in basal cell carcinoma (BCC) tumors, but most epidemiologic studies have not observed associations between genus-β HPV seropositivity and BCC. A clinic-based case–control study was conducted to investigate cutaneous HPV infection in BCC. BCC cases ( n =224) were recruited from a dermatology clinic, and controls ( n =300) were patients who were screened negative for skin cancer. Antibodies against cutaneous HPV types in genera α, β, γ, mu, and nu were measured, and tumors from a subset of BCC cases ( n =195) were tested for HPV DNA. Overall associations were observed between BCC and seropositivity for HPV types in genus-α (odds ratio (OR)=1.61; 95% confidence interval (CI)=1.11–2.35), γ (OR=1.78; 95% CI=1.22–2.60), and mu (OR=1.56; 95% CI=1.06–2.30). BCC cases with β-HPV DNA in their tumors were more likely to be β-HPV seropositive than controls (OR=1.76; 95% CI=1.03–3.01), with type-specific associations observed for HPV8 and HPV23, whereas no association was observed between β-HPV seropositivity and β-HPV DNA–negative BCC. No concordance between seropositivity and tumor DNA status was observed for HPV types in genera α and γ. In conclusion, the combined serology and tumor DNA results suggest that β HPV types may have a role in BCC. Additional studies of BCC that assess HPV types in multiple genera are needed.