IDO1 and posterior cortical atrophy: It says that 87.5% of patients with indolent PCa (GS ≤ 6 and BR− and no treatment after biopsy), 100% of patients with no PCa, and 27% of patients with clinically relevant PCa (GS ≥ 7, BR−, treatment after biopsy) expressed IDO below 0.0096 (73% of patients with clinically relevant PCa above 0.0096; NPV 83%, PPV 88%) (Figure 7C).