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Br J Urol. 1998 Jun;81(6):862-9.

Prognostic factors in muscle-invasive bladder cancer treated with radiotherapy: an immunohistochemical study.

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1
Department of Medical Oncology and Radiotherapy, Norwegian Radium Hospital, Norway.

Abstract

OBJECTIVE:

To determine the prognostic role of p53, Ki-67 and p21 for patients with muscle-invasive bladder cancer treated with curative intent by radiotherapy.

PATIENTS AND METHODS:

The study included 131 patients (24 women and 107 men, median age 72 years, range 40-86) with transitional cell carcinoma (T2-T4) treated with external definitive pelvic radiotherapy between 1985 and 1994. Paraffin-embedded pretreatment biopsies from the patients were examined for the presence of p53, p21 and Ki-67, detected by immunohistochemistry, and related to tumour stage, grade and patient survival.

RESULTS:

The expression of p53 protein correlated positively with the detection of Ki-67 (P < 0.05) but did not correlate with p21. None of the immunohistochemical variables (p53, p21 or Ki-67) correlated with T category and only Ki-67 correlated with histological grade. Patients with > 5% p21 expression tended to live longer than those with < 5% (P = 0.09). In a multivariate analysis, the T category (T2/T3 vs. T4), histological grade (2 vs. 3) and p21 expression (< or = 5% vs. > 5%) were independent prognostic factors for overall survival.

CONCLUSION:

Further investigation is warranted in patients with muscle-invasive bladder cancer undergoing different types of treatment p21 seems to play an independent prognostic role in these patients, in addition to T category and grade.

[Indexed for MEDLINE]

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