Laparoendoscopic single-site surgery versus conventional laparoscopic surgery for adnexal tumors: a comparison of surgical outcomes and postoperative pain outcomes.

The objective of this study was to show the feasibility of laparoendoscopic single-site surgery (LESS) by comparing the surgical outcomes and postoperative pain of LESS with conventional laparoscopic surgery (CLS) for gynecologic adnexal tumor. This is a prospective case-control study. We enrolled 33 patients-one in 18 patients for LESS and the other in 15 patients for CLS-who were diagnosed with evident adnexal tumor consecutively from September 2009 to February 2010 and were performed by a single surgeon. In LESS, all procedures were performed successfully without any case of conversion to CLS. There were no differences in the demographic characteristics between the two groups. The pathological findings were similar in both groups; a mucinous cystadenoma was the most common pathological feature. The most common operative type performed was cystectomy (22/33, 66%). There were no differences between the LESS and CLS groups in median operation time (62.8 minute vs. 51.3 minutes, p=0.073); estimated blood loss during operation (100 mL vs. 128 mL, p=0.068); and postoperative pain intensity measured by visual analog scale. There were no major complications in either group, including operative wound complications. Our study suggested that LESS for adnexal tumor is a feasible surgical technique through the comparable data of the surgical outcomes and postoperative pain outcomes.