Cancer Prognostics and Health Outcomes Unit, University of Montreal Health Centre, Montreal, Canada.Department of Urology, Vita Salute San Raffaele University, Milan, Italy.
We tested relationship between pelvic lymph node dissection (PLND) status at the time of radical prostatectomy (RP) and survival in prostate cancer (PCa) patients.
Overall, 127,824 PCa patients treated with RP between 1988 and 2006 were included. Univariable and multivariable Cox regression analyses were used to evaluate the impact of PLND status (pN0 vs. pNx vs. pN1) on cancer-specific mortality (CSM) and overall mortality (OM) rates.
In pT2 patients, the 5-, 10-, and 15-year CSM rates were: 0.4%, 1.7%, and 3.9% for pN0, 0.6%, 2.5%, and 4.7% for pNx, 2.7%, 11.9%, and 20.6% for pN1 patients (all P < 0.001). The 5-, 10-, and 15-year OM rates were: 5.4%, 16.3%, and 34.5% for pN0, 6.1%, 18.2%, and 35.3% for pNx, 11.5%, 32.7%, and 53.4% for pN1 (all P < 0.001). In multivariable analyses, pNx and pN1 stage increased CSM rate, respectively by 1.3- and 3.8-fold (both P < 0.001) relative to pN0. Similarly, pNx and pN1 increased OM rate respectively by 1.1- and 1.6-fold (both P < 0.001) relative to pN0. In pT3 patients, pNx stage did not significantly increase CSM or OM rates relative to pN0 (both P > 0.05).
Patients with localized PCa treated with RP without a PLND (pNx) have less favorable survival rate than their counterparts that do not harbor lymph node invasion at PLND. However, the difference is modest (0.8% at 10 years). In consequence, the related costs and benefits of this procedure should be weighted carefully. In addition, the survival benefit of PLND was not observed in locally advanced PCa patients.
Abdollah F, Schmitges J, Sun M, Tian Z, Briganti A, Shariat SF, Perrotte P, Montorsi F, Karakiewicz PI. Are you the author?
Reference: Prostate. 2011 Apr 7. Epub ahead of print.