Resumo

OJEA CALVO, A. et al. The usefulness of ki67 expression in the biopsy specimens, to predict the biochemical progresion of the prostate cancer after radical prostatectomy. Actas Urol Esp [online]. 2004, vol.28, n.9, pp.650-660. ISSN 0210-4806.

OBJETIVE: To evaluate the usefulness of Ki67 expression in the biopsy specimens, to predict the biochemical progression of the prostate cancer after radical prostatectomy. MATERIAL AND METHODS: We analyse the Ki67 expression in the biopsy specimens of 103 patients treated with radical prostatectomy. The mean follow up is 3.4 years (1.3-8.8 years). We correlate the biochemical progression with traditional prognostic factors as the PSA (>10/≤10), Gleason (≥7/<7), pT ification (pT3/pT0-2) and immunohistochemical factor Ki67 (>3%/≤3%). RESULTS: Of all 103 patients, in 71 (69%) biochemical progression was not detected and in 32 (31%) biochemical progression was detected. The mean of preoperative PSA is 10.07 ng/ml in the patients without progression and 20.90 ng/ml in the patients with biochemical progression (p=0.0001). The mean of Gleason score in 6.03 in the patients without progression and 6.75 in the patients with biochemical progression (p=0.0001). The percentage of Ki67 expression is 3.95% in the patients without progression and 5.05% in the patients with biochemical progression (p=0.030). The tumors pT0-2 progressed 12/67 (17.9%) and the tumors pT3 progressed 20/36 (55.6%) (p=0.0001). Multivariant regression analysis indicate that it does not exist a statistically significant relation between Ki67 (>3%/≤3%) expression in the biopsy specimens and the biochemical progression of the prostate cancer after radical prostatectomy (p=0.204). CONCLUSIONS: The immunohistochemical factor Ki67 (>3%/≤3%) in the biopsy specimens, is less effective than the ic factors, PSA (>10/≤10), Gleason (≥7/<7) and pT ification (pT3/pT0-2), to predict the biochemical progression of the prostate cancer after radical prostatectomy.

Palavras-chave : Prostate cancer; Radical prostatectomy; Biochemical progression; Prognostic factors; Ki67.

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