In this paper, 44 patients of bladder cancer are examined for MSI at BAT-26, BAT-40, TGFbRII, IGFIIR, BAX, & hMSH3 & D2S123, D9S283, D9S1851 & D18S58 dinucleotide repeat motifs. This evidence concerns the gene MSH3 and urinary bladder carcinoma.