In majority of the cases, focal expression of MUC4 was observed in urothelial carcinoma (N = 122 or 58%, mean H-score, mean intensity 0) whereas other cases showed mild positivity (N = 89 or 42% cases, mean H-score 0.68±0.14, mean intensity 0.91±0.19). The gene discussed is MUC4; the disease is urothelial carcinoma.