TRIM28 and posterior cortical atrophy: To evaluate the protein expression of TRIM28 at varying stages of PCa progression, we analyzed TRIM28 IHC staining intensity in benign prostatic hyperplasia (BPH) (n = 16), Gleason score < 7 (n = 25), 7 [3 + 4] (n = 63), 7[4 + 3] (n = 26) and > 8 (n = 29).