Luminal tumors expressing GATA3 constituted most of our studied cases (27/60;45%) which was slightly lower than the MDA cohort and Lund group (70 and 82.5% respectively); the aforementioned studies had a total larger number of cases that included both invasive and noninvasive bladder tumors while the present study included only MIBCs. The gene discussed is GATA3; the disease is urinary bladder neoplasm.