Mean FKBP51 expression in the six HPV-positive tumors, all of them showing good outcome, were 11.8%, against an average positivity of 59.6% in the remaining 20 HPV negative oropharyngeal tumors (p < 0.05 ANOVA test); average FKBP51 positivity in the 46 non-oropharyngeal tumors was 48% (Table 3 and Figure 3B). This evidence concerns the gene FKBP5 and neoplasm of oropharynx.