GPR107 and posterior cortical atrophy: GPR107 IHC analysis was performed on 16 FFPE pieces (Figure 1b), which revealed that GPR107 staining was negligible in benign prostate gland epithelium (N-TAR; Figure 1b), while it was always more, and highly, intense in the cancerous prostate glands (N-TAR vs. PCa/tumor-tissue; Figure 1b).