As mentioned before, the mean expression levels of N-cadherin, Slug, and Twist were significantly higher in HPV-positive cases, compared to the HPV-negative group, while PTPN13 and E-cadherin were significantly downregulated in the HPV-positive PCa group, compared to the HPV-negative PCa group (Table 5). The gene discussed is PTPN13; the disease is posterior cortical atrophy.