PCa participants had a mean PSA level of 17.6 ng/mL ± 14.5 and Gleason grades of 3 + 4 (n = 7), 4 + 3 (n = 9), and 4 + 4 (n = 4) determined at biopsy before imaging. The gene discussed is KLK3; the disease is posterior cortical atrophy.