PATHOLOGICAL FEATURES AND PROGNOSTIC SIGNIFICANCE OF PROSTATE CANCER IN THE APICAL SECTION DETERMINED BY WHOLE MOUNT HISTOLOGY

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Abstract
We test the hypothesis that cancer in the apical section of the prostate is an important independent factor in predicting the progression of clinically localized prostate cancer. We analyzed clinical data and whole mount histological step sections for 500 patients who had undergone radical retropubic prostatectomy for clinically localized prostate cancer. Cancer was in the apex of the prostate in 175 patients (35%). These patients had a larger cancer and higher incidence of positive surgical margins, and were more likely to have a poorly differentiated cancer than the 325 patients without cancer in the apex. However, the presence of apical cancer was not a significant predictor of clinical or prostate specific antigen progression in either univariate or multivariate Cox proportional hazards models when analyzed for the entire group or only in patients with tumor confined to the prostate. Apical cancer in a radical prostatectomy specimen is simply a sign of a larger volume cancer and is not independently associated with an increased risk of clinical or prostate specific antigen progression.