Predictive value of GATA3 and Ki-67 expression in biopsy and transurethral resection specimens in patients with urothelial carcinoma of the urinary bladder

Introduction/Objective Urothelial carcinoma is the most commonly diagnosed malignancy of urinary bladder in clinical and pathohistological practice where various prognostic factors play a significant role. One of the most important pathohistological prognostic factors is the intensity of immunohistochemical staining. Among various immunohistochemical markers that have been proven to influence disease progression and the patient's survival, role of Ki-67 and GATA3 in prediction of disease prognosis has not been completely clarified yet. The aim of this study was to determine the predictive value of GATA3 and Ki-67 mutual expression in urothelial carcinoma. Methods Eighty patients were included in this study, out of which four groups were formed based on the pathological stage of urothelial carcinoma. After using preferred antibodies, their staining intensity was analyzed semiquantitatively. Results Results showed that there was statistically significant correlation between the type of urothelial carcinoma, the pathological stage, and invasiveness and different grades of GATA3 expression, as well as statistically significant correlation between the type of urothelial carcinoma and the pathological stage and different grades of Ki-67 expression. The regression model showed low value of GATA3 and Ki-67 mutual expression. There was also statistical significance regarding the pathological stage and invasiveness of the tumor in survival analysis. Conclusion Predictive value of GATA3 and Ki-67 mutual expression resulted as low from this study, but to our knowledge this was the first study to examine their predictive capability on biopsy and transurethral resection specimens.