CEACAM1 and neoplasm: Another cell adhesion molecule, the carcinoembryonic antigen‐related cell adhesion molecule 1 (CEACAM1), exhibited differential expression within the epithelium of the superficial bladder tumors and the prostate intraepithelial neoplasia of the prostate; however, in both cancers, CEACAM1 overexpression effectively suppressed tumor vascularization.23