Also KRT8 expression in normal versus PCa tissues revealed statistically significant differences across GS, including normal prostate tissue versus GS 6 (p = 1.80 × 10−5), GS 7 (p = 3.44 × 10−8), GS 8 (p = 2.01 × 10−4), GS 9 (p = 9.43 × 10−4) and GS 7 versus GS 9 (p = 2.66 × 10−3) (Figure 5H). This evidence concerns the gene KRT8 and posterior cortical atrophy.