Whether the expression of the apoptosis inhibitor survivin was correlated with the degree of differentiation and the stage of transitional cell carcinoma of the urinary bladder was studied. Sixty samples of surgical specimens from patients with urothelial carcinomas of various degrees of differentiation and different stages were examined. An immunohistochemical study using the monoclonal antibodies obtained by the authors was conducted. The high expression of survivin was shown to be correlated with the lower-grade differentiation of a tumor and its higher stage.
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