Radical prostatectomy in very high-risk localized prostate cancer: Long-term outcomes and outcome predictors

Abstract

The objective of this study was to present the long-term outcomes and determine outcome predictors in very high-risk (cT3b-T4) prostate cancer (PCa) after radical prostatectomy (RP). Between January 1989 and December 2004, 51 patients with cT3b-T4 PCa underwent RP. Kaplan-Meier survival analysis was used to calculate the biochemical progression-free survival (BPFS), clinical progression-free survival (CPFS), cancer-specific survival (CSS) and overall survival (OS) rate. Multivariate Cox proportional hazard models were used to determine the predictive power of clinical and pathological variables in BPFS and CPFS. Median follow-up was 108 months [interquartile range (IQR) 73.5-144.5]. The median serum prostate-specific antigen (PSA) was 16.9 ng/ml (IQR 7-37.2). Median biopsy and pathological Gleason (pGS) score were both scored as 7 (range 4-10 and 5-9, respectively). Overstaging was frequent (37.2%); four patients (7.8%) had organ-confined stage pT2, while 15 (29.4%) had extracapsular extension only (pT3a). Another 23 (45.1%) were confirmed with seminal vesicle invasion (pT3b) and nine (17.7%) had adjacent structure invasion (pT4). Eleven patients (21.6%) had lymph-node involvement. Thirty-two patients (62.7%) had positive surgical margins. The BPFS, CPFS, CSS and OS at 5 and 10 years were 52.7%, 45.8%;78.0%, 72.5%; 91.9%, 91.9% and 88.0%, 70.7%. In the multivariate Cox proportional hazard models, pathological stage was an independent predictor of BPFS while preoperative PSA and pGS was an independent predictor of CPFS. The management of cT3b-T4 PCa typically consists of a multimodality treatment in which RP is a valuable first step. Overstaging was frequent (37.2%), and almost one-quarter of the patients remained free of additional treatments. Long-term cancer-related outcomes were very satisfactory.