CDKN2A and urinary bladder carcinoma: Within the seven subset of gene expression of CDC20, CDKN2A, CTSV, and FOXM1 significant changes in stage-specific expression were exhibited, while KRT23 and MAGEA6 showed changes at T2, T3, and T4 stages of bladder cancer, whereas no significant changes were noted between T1 and normal bladder tissue.