FUT4 and bladder urachal adenocarcinoma: Useful biomarkers of urachal adenocarcinomas, like alpha-methylacyl-CoA racemase (AMACR, p504s), CD15 (Leu-M1), carcinoembryonic antigen (CEA), CK34βE12 (high-molecular weight cytokeratin), GATA binding protein 3 (GATA3), mucin 2 (MUC2), and mucin 5AC (MUC5AC), should be taken into consideration [71].