PMID: 9179065Jun 1, 1997Paper

Overexpression of p53 in transitional cell carcinoma of the renal pelvis and ureter. Relation to tumor proliferation and survival

Cancer
A ReyR Apolinario

Abstract

Clinical management of patients with tumors of the upper urinary tract is based mainly on histologic grade and stage of the tumors. In recent years, tumor proliferation has also proved to be an important factor in determining the prognosis of these and other transitional cell tumors. The aim of this study was to assess the role of p53 in regulating cell proliferation and tumor progression and to define its value in predicting the long term survival of patients with these tumors. Such information could be of use in selecting treatment in individual cases. Eighty-three patients with urothelial tumors of the renal pelvis and ureter diagnosed and treated between 1975 and 1993 were included in this study. p53 immunostaining was performed on paraffin embedded tissue. Tumor location, histologic grade, histologic pattern, tumor proliferation by Ki-67, local (T classification), lymph node (N classification), vascular and perineural invasion, and clinical stage (TNM) were assessed in relation to p53 overexpression (Mann-Whitney U test and analysis of variance comparisons) and as prognostic factors for survival in both univariate analysis (log rank test) and multivariate analysis (Cox proportional hazards model). Overexpression of p53 was...Continue Reading

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