KLK3 and prostate intraepithelial neoplasia: We matched the normal, prostatic intraepithelial neoplasia (PIN) and PCa foci with regions of normal glands, PIN and PCa in the patient's H&E stained and mapped section (Figures 2A,B) along with marked organoids for cytokeratins (CKs) and prostatic specific antigen (PSA).