Objective To evaluate the role of systematic lymphadenectomy (SL) vs. unsystematic lymphadenectomy (USL) for improving overall survival (OS) in epithelial ovarian cancer (EOC). Methods The databases such as PubMed, EMbase, The Cochrane Library, Evidence-Based Medicine Reviews (EBMR), CBM, CNKI and VIP were searched between January 1, 1995 and December 31, 2010, the randomized controlled trials (RCTs) and observational studies on SL vs. USL in treating EOC were included. Based on Cochrane handbook, the data were extracted, the methodological quality was assessed, and then meta-analyses were conducted by using RevMan 5.0 software. Results The total 13 studies involving 22 796 patients were included, including 5 420 patients in the SL group, and the other 17 376 patients in the USL group. Two of the 13 studies were RCTs, and the other 11 were observational studies (including 2 studies retrieved from SEER data). The analyses on 2 RCTs showed that compared with USL, a) SL could not improve 5-PFS (OR=0.70, 95%CI 0.40 to 1.22, P=0.21) in early-stage EOC (FIGO I to II), but it did improve 5-PFS (OR=0.62, 95%CI 0.40 to 0.96, P=0.03) in advanced-stage EOC (FIGO III to IV); b) SL could not improve 5-OS in both early-stage EOC (OR=0.84; 95%CI 0.44 to1.58, P=0.58) and advanced-stage EOC (OR=0.93, 95%CI 0.64 to 1.37, P=0.73); and c) SL could not improve 5-OS in both early-stage (OR=0.84, 95%CI 0.44 to 1.58, P=0.58) and advanced-stage (OR=0.93, 95%CI 0.64 to 1.37, P=0.73) of EOC patients who had optimal tumor dubulking surgery. The analyses on observational studies showed that compared with USL, a) SL could not improve 5-PFS in both early-stage EOC (OR=0.38, 95%CI 0.08 to 1.74, P=0.21) and advanced-stage (OR=2.88, 95%CI 0.95 to 8.72, P=0.06) EOC; b) Whether SEER impacts were excluded or not, SL did improve 5-OS in both early-stage EOC (OR=0.54, 95%CI 0.46 to 0.63, Plt;0.000 01) and advanced-stage (OR=0.47, 95%CI 0.43 to 0.52, Plt;0.000 01) EOC; and c) For EOC patients who had optimal tumor dubulking surgery, SL could not improve 5-OS in early-stage (OR=0.32, 95% CI 0.02 to 6.19, P=0.45), but it did improve 5-OS in advanced-stage (OR=0.53, 95%CI 0.32 to 0.88, P=0.01). Conclusion These findings suggest that maybe SL can improve 5-PFS and 5-OS in EOC. However, the efficacy of SL on 5-PFS and 5-OS is still undetermined, so more relevant studies are required for further investigating the role of SL in EOC.
目的 評價腫瘤細胞減滅術治療復發上皮性卵巢癌（EOC）的作用，分析影響生存時間的因素。 方法 按Cochrane系統評價方法，計算機檢索PubMed、EMbase、Medline、Cochrane Library、循證醫學數據庫（EBMR）、中國生物醫學文獻數據庫（CBM）、中國期刊全文數據庫（CJFD）、清華同方等數據庫，并手工檢索相關領域雜志。檢索時間從1985年1月1日－2011年11月30日，查找手術治療復發EOC患者的回顧性、非隨機前瞻性、病例對照研究，由兩位研究者按照納入排除標準篩選文獻、評價質量并提取資料后，采用SPSS軟件進行線性回歸分析。 結果 共納入48篇文獻（回顧性文獻40篇，非隨機前瞻性文獻7篇，病例對照研究1篇）共2 605例。簡單線性回歸分析結果顯示滿意切除比例與中位生存時間回歸模型成立，有統計學意義（F=7.346，P=0.009），漿液性病理類型比例與中位生存時間回歸模型成立，有統計學意義（F=5.537，P=0.025），殘留病灶大小與中位生存時間回歸模型成立，有統計學意義（F=4.249，P=0.045），多重逐步線性回歸分析顯示僅有滿意切除比率對術后中位生存時間的影響有統計學意義（P=0.009）。 結論 二次腫瘤細胞減滅術主要適用于鉑類敏感型可切除及孤立結節復發EOC患者，要獲得明確二次腫瘤細胞減滅術治療復發EOC對中位生存時間的影響，尚需進行大樣本隨機對照的研究。