Prevalence of human papillomavirus in oral epithelial dysplasia: Systematic review and meta-analysis.

The purpose of this systematic review and meta-analysis was to estimate the overall and type-specific prevalence of human papillomavirus (HPV) DNA in oral epithelial dysplasia and assess p16INK4a overexpression in relation to HPV-status. A systematic literature search identified 31 eligible studies (832 cases) evaluating the presence of HPV DNA in oral epithelial dysplasia cases by PCR. Of these, six studies evaluated p16INK4a overexpression in relation to HPV-status. The overall pooled prevalence of HPV DNA in oral epithelial dysplasia was 27.2% (95% CI: 17.6-38.1). We observed substantial interstudy heterogeneity, which could not be explained by differences in continent, tissue type, or severity of epithelial dysplasia. HPV16 was the predominant genotype detected. Moreover, 62.2% of HPV positive and 17.8% of HPV negative oral epithelial dysplasia samples stained intensively positive for p16INK4a . This meta-analysis found that 27% of oral epithelial dysplasia harbor HPV DNA. Whether this represents a transient infection or has a carcinogenic role is unknown.