Figure 2

Immunohistochemical analyses for the expression of p16. Acanthosis (A, B), oral epithelial dysplasia (C, D) and oral squamous cell carcinoma (E, F) (H&E × 20) and (DAB peroxidase × 20). High grade intraepithelial neoplasia (G). The p16 positive control (lung adenocarcinoma) (H).