KLK3 and posterior cortical atrophy: No significant PSA decrease was observed with antibiotic treatment in patients with PCa (PSAi: 7.1 ng/mL, PSAab 7.05 ng/mL, p = 0.09), however, a statistically significant PSA decrease was evident in patients with benign pathology (PSAi: 6.1 ng/mL, PSAab: 5.5 ng/mL, p = 0.01).