Is minimally invasive esophagectomy effective for preventing anastomotic leakages after esophagectomy for cancer? A systematic review and meta-analysis

Can Zhou, Gang Ma, Xiao Li, Juan Li, Yu Yan, Peijun Liu, Jianjun He, Yu Ren, Can Zhou, Gang Ma, Xiao Li, Juan Li, Yu Yan, Peijun Liu, Jianjun He, Yu Ren

Abstract

Background: Compared with open esophagectomy (OE), minimally invasive esophagectomy (MIE) proves to have clear benefits in reducing the risk of pulmonary complications for patients with resectable esophageal cancer. The objectives of our study were to explore the superiority of MIE in reducing the occurrence of anastomotic leakages (ALs) when compared to OE.

Methods: A systematic review and meta-analysis was performed to assess the superiority of MIE on the occurrence of ALs over OE, by searching many sources (through December, 2014) such as Medline, Embase, Wiley Online Library, and Cochrane Library. Fixed-effects model was used to calculate summary odds ratios (ORs) to quantify associations between OE and MIE groups. Cochran's Q and I(2) statistics were used to evaluate heterogeneity among studies.

Results: Among a total of 43 studies involving 5537 patients included in the meta-analysis, 2527 (45.6%) cases underwent MIE and 3010 (54.4%) cases underwent OE. Compared to patients undergoing OE, patients undergoing MIE did not have statistical significance in reduced occurrence of ALs (OR = 0.97, 95% CI = 0.80-1.17). Insignificant reduced occurrence of ALs was not associated with anastomotic location (OR = 0.90, 95% CI = 0.71-1.13) or anastomotic procedure (OR = 1.02, 95% CI = 0.79-1.30).

Conclusions: More proofs are needed to clarify the strengths or weaknesses of MIE in preventing anastomotic leakages after esophagectomy for cancer. A largely randomized, controlled trial should be undertaken to resolve this contentious issue urgently.

Figures

Fig. 1
Fig. 1
Flow diagram of the search and selection method
Fig. 2
Fig. 2
MIE and risk of anastomotic leakages (ALs)
Fig. 3
Fig. 3
Anastomotic location of MIE and risk of anastomotic leakages (ALs)
Fig. 4
Fig. 4
Anastomotic procedure of MIE and risk of anastomotic leakages (ALs)
Fig. 5
Fig. 5
Begg plot of included studies

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