ALDH1A1 and posterior cortical atrophy: Next, we performed a comparative analysis of the expression levels of ALDH1A1 (n = 613) and ALDH1A3 (n = 325) proteins in benign prostatic tissues, primary PCa tissues, tissues from locally advanced or recurrent PCa, lymph node and distant metastasis (Lübeck cohort) by immunohistochemical staining.