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  • Title: Pelvic lymph node dissection and its extent on survival benefit in prostate cancer patients with a risk of lymph node invasion >5%: a propensity score matching analysis from SEER database.
    Author: Chen J, Wang Z, Zhao J, Zhu S, Sun G, Liu J, Zhang H, Zhang X, Shen P, Shi M, Zeng H.
    Journal: Sci Rep; 2019 Nov 29; 9(1):17985. PubMed ID: 31784574.
    Abstract:
    Pelvic lymph node dissection (PLND) represents the gold standard for nodal staging in PCa and is recommended for patients with a probability of lymph node invasion (LNI) >5%. However, the therapeutic role of PLND and its extent remains a debate. In this study, data of 20,668 patients treated with radical prostatectomy (RP) with and without PLND from SEER database between 2010 and 2015 were retrospectively analyzed. All patients had a risk of LNI >5% according to 2012-Briganti nomogram. Propensity score matching (PSM) was performed to balance baseline characteristics between patients with and without PLND. Kaplan-Meier curves and Cox regression were used to evaluate the impacts of the PLND and its extent on cancer-specific survival (CSS) and overall survival (OS). In overall cohort, patients with PLND were associated with more aggressive clinicopathologic characteristics and had poorer survival compared to those without PLND (5-year CSS rate: 98.4% vs. 99.7%, p < 0.001; 5-year OS rate: 96.3% vs. 97.8%, p < 0.001). In the post-PSM cohort, no significant difference in survival was found between patients with and without PLND (5-year CSS rate: 99.4% vs. 99.7%, p = 0.479; 5-year OS rate: 97.3% vs. 97.8%, p = 0.204). In addition, the extent of PLND had no impact on prognosis (all p > 0.05). Subgroup analyses reported similar negative findings. In conclusion, neither PLND nor its extent was associated with survival in North American patients with a risk of LNI >5%. The cut-off point of 5% probability of LNI might be too low to show benefits in survival in patients underwent PLND.
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