Objective: To evaluate, regarding previous published studies, postoperative outcomes between patients undergoing rectal cancer resection performed by totally laparoscopic approach (LAP) compared to those who underwent peroperative conversion (CONV).
Methods: Studies comparing LAP versus CONV for rectal cancer published until December 2017 were selected and submitted to a systematic review and meta-analysis. Articles were searched in Medline and Cochrane Trials Register Database. Meta-analysis was performed with Review Manager 5.0.
Results: Twelve prospective and retrospective studies with a total of 4503 patients who underwent fully laparoscopic approach for rectal cancer and a total of 612 patients who underwent conversion were included. Meta-analysis did not show any significant difference on overall mortality between both approaches (OR=0.47, 95%CI=0.18-1.22, P=0.12). However, Meta-analysis showed that anastomotic leakage rate, wound abscess rate and postoperative morbidity rate were significantly decreased with totally laparoscopic approach (OR=0.37, 95%CI =0.24-0.58, P<0.0001; OR=0.29, 95%CI=0.19-0.45, P<0.00001; OR=0.56, 95%CI=0.46-0.67, P<0.00001 respectively).
Conclusion: This meta-analysis suggests that conversion increases anastomotic leakage, overall morbidity and wound abscess rates without increasing mortality rate for patients who underwent rectal resection for cancer.
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