Objective: A prospective randomized study was undertaken to determine whether cell proliferation indices (M/V index, MIB1), papillary status, the expression of p53 and epidermal growth factor receptor (EGFr) have prognostic value in superficial (pTa-pT1) bladder cancer (SBC).
Methods: 207 patients with primary SBC were followed up over a period of 4.9 (range 3.7-6.0) years. M/V index and papillary status were assessed by light microscopy, and expression of MIB1, p53 and EGFr was assessed by immunohistochemistry. The results of histopathological analyses were related to the survival data of the patients.
Results: Using univariate analysis, stage (p < 0.001), grade (p < 0.001), papillary status (p < 0.001), MIB1 (p < 0.001), M/V index (p < 0.001), EGFr (p < 0.001) and p53 (p = 0.002) were significant predictors of progression. Using multivariate analysis, MIB-1 score and papillary status were independent predictors of progressive disease and cancer-specific survival. Tumor grade was the only independent predictor of recurrence.
Conclusion: Evaluation of tumor cell proliferation rate by M/V index or by MIB1 immunohistochemistry and assessment of papillary status by light microscopy are useful prognostic tools in tailoring treatment and follow-up schedule of patients with SBC.
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