Fig. 4

Representative results of an oropharyngeal squamous cell carcinoma with low p16 and HPV RNA expression. a positive p16 IHC, DAB staining (50x); b positive HPV RNA in situ hybridization, DAB staining (50x); c-d multiplex HPV RNA ISH/p16 IHC: positive p16 IHC Fast Red staining and positive HPV RNA ISH DAB staining (50x)