The prognostic value of neuroendocrine differentiation in adenocarcinoma of the prostate in relation to progression of disease after endocrine therapy

The Journal of Urology
J L KrijnenT H van der Kwast

Abstract

We evaluated the prognostic impact of neuroendocrine differentiation in prostate cancer with regard to the onset of endocrine therapy failure. A retrospective study was performed on 72 transurethral resection specimens from patients who subsequently underwent endocrine therapy for prostate cancer and were followed for 44 to 95 months. Progression-free interval was recorded. Distribution pattern and proportion of neuroendocrine cells were examined in transurethral resection specimens. Neuroendocrine cells were identified based on immunoreactivity for chromogranin A. Of 32 patients with progressive disease 27 died of prostate cancer. Chromogranin A positive cells were found in 40 of the 72 prostate cancers (55%). In a Cox proportional hazards analysis neuroendocrine differentiation of the tumor showed a negative correlation with progression-free survival (p = 0.022), which proved to be independent of the Gleason score (p < 0.001). Our results support the view that neuroendocrine differentiation in prostatic adenocarcinomas is a prognostic factor for progressive disease under subsequent endocrine therapy. This prognosticator acts independently of tumor grade.

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