Expression of survivin, a novel inhibitor of apoptosis, in superficial transitional cell carcinoma of the bladder.

ABSTRACTPurpose: We investigated whether the over expression of survivin, a new antiapoptotic protein, might provide prognostic information in patients with superficial bladder cancer.Materials and Methods: Immunohistochemical staining of paraffin sections using a monoclonal antibody for survivin was performed in 88 cases of superficial bladder cancer using the standard avidin-biotin-peroxidase technique. The relationships between the expression of survivin, clinicopathological characteristics and clinical outcome were analyzed.Results: Survivin expression was found in tumor cells but not in nonneoplastic bladder tissues. High expressions (greater than 20%) of survivin were observed in 51 cases (58.0%) and low expression in 37 cases. No statistically significant association was observed between survivin expression and tumor grade (p = 0.052) or pathological stage (p = 0.131). When clinical data such as sex, age, tumor number, size or shape were examined in conjunction with survivin status no statistically...