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Background  Pelvic lymphadenectomy (PLND) is an integral part of curative surgery for high-risk non-muscle invasive and muscle-invasive bladder cancer. The therapeutic value of extended PLND is controversial.    Methods  We conducted a comprehensive online search in PubMed, EMBASE, and the Cochrane Library databases for relevant literature directly comparing extended PLND (e-PLND) with non-extended PLND (ne-PLND) from database inception to June 2019. We performed the meta-analysis to evaluate the impact of PLND templates on recurrence-free survival (RFS), disease-specific survival (DSS), overall survival (OS), rates of postoperative major complications, and mortality within 90 days of surgery.    Results  A total of 10 studies involving 3979 patients undergoing either e-PLND or ne-PLND were included. The results showed that e-PLND was significantly associated with better RFS (HR 0.74, 95% CI 0.62–0.90,  p  = 0.002) and DSS (HR 0.66, 95% CI 0.55–0.79,  p  < 0.001). However, no correlation was found between e-PLND template and a better OS (HR 0.93, 95% CI 0.55–1.58,  p  = 0.79). Postoperative major complications were similar between e-PLND group and ne-PLND group, as was mortality within 90 days of surgery.    Conclusion  e-PLND template is correlated with favorable RFS and DSS outcomes for patients with bladder cancer. e-PLND did not have more postoperative major complications than did ne-PLND.

world journal of surgical oncology

Extended versus non-extended lymphadenectomy during radical cystectomy for patients with bladder cancer: a meta-analysis of the effect on long-term and short-term outcomes