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  • Title: Limited pelvic lymph node dissection does not improve biochemical relapse-free survival at 10 years after radical prostatectomy in patients with low-risk prostate cancer.
    Author: Weight CJ, Reuther AM, Gunn PW, Zippe CR, Dhar NB, Klein EA.
    Journal: Urology; 2008 Jan; 71(1):141-5. PubMed ID: 18242383.
    Abstract:
    OBJECTIVES: To compare the long-term differences in actuarial biochemical relapse-free survival rates from a contemporary series of patients who underwent radical prostatectomy with and without pelvic lymph node dissection (PLND). METHODS: The records of 806 consecutive radical prostatectomy cases performed from January 1995 to June 1999 were reviewed. The entire subset of patients (n = 336) with low-risk disease, defined by a prostate-specific antigen level of 10 ng/mL or less, biopsy Gleason score of 6 or less, and clinical Stage T1 or T2a, who had not received adjuvant or neoadjuvant therapy were divided into two groups according to whether PLND was performed (PLND group, n = 140) or omitted (no-PLND group, n = 196). A Cox proportional hazards model was used to analyze the effect of demographic, pretreatment, surgical, and pathologic factors on the likelihood of biochemical failure. Biochemical relapse-free survival for each group was estimated by Kaplan-Meier analysis. The median prostate-specific antigen follow-up time for the entire group was 89.0 months, with a similar follow-up for both cohorts (PLND group 94.5 months and no-PLND group 88.0 months, Mann-Whitney U test, P = 0.14). RESULTS: The long-term biochemical relapse-free survival rate for the entire cohort was 86.1% at 10 years. The 10-year actuarial biochemical relapse-free rate for the PLND and no-PLND groups was 83.8% and 87.9%, respectively (log-rank, P = 0.33). On univariate analysis, PLND was not an independent predictor of outcome (Wald, P = 0.33). CONCLUSIONS: The results of our study have shown that the omission of limited PLND in patients with favorable tumor characteristics does not adversely affect biochemical relapse-free survival at 10 years. Such patients can be spared the morbidity and cost of PLND without affecting their chance for cure.
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