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Background  In recent years, natural orifice specimen extraction surgery (NOSES) has become a field of special interest for colorectal surgeons. Some researchers have reported transanal specimen extraction in the laparoscopic anterior rectal resection, including intersphincteric resection (ISR) and rectal eversion-resection. However, these surgical procedures have certain limitations. Based on the proven expertise in laparoscopic surgery, our center has developed a modified technique of transanal specimen extraction. The aim of this study was to investigate the safety and feasibility of a modified technique of transanal specimen extraction in the laparoscopic anterior rectal resection.    Methods  From January 2011 to January 2014, the patients with upper rectal or lower sigmoid colon cancer who had undergone laparoscopic anterior rectal resection with specimen extraction by a modified transanal technique were enrolled in the observation group, and the patients who had undergone laparoscopic anterior rectal resection with specimen extraction via an abdominal incision by the same surgeons during the same period were enrolled in the control group.    Results  A total of 36 patients were included in the observation group and 128 patients were included in the control group. There were no significant differences ( P  > 0.05) between the two groups in terms of the mean operative time [144 ± 10 min vs. 141 ± 11 min], mean intraoperative blood loss [63 ± 6 ml vs. 61 ± 7 ml], and the mean time to anal exhaust [67 ± 7 h vs. 65 ± 8 h]. However, there were significant differences ( P  < 0.05) between the two groups in terms of the mean postoperative Visual Analogue Scale (VAS) pain scores [3.4 ± 1.1 vs. 4.5 ± 1.2], mean postoperative hospital stay [6.0 ± 1.1 days ± vs. 7.2 ± 1.2 days], and incidence of postoperative complications (4/36 vs. 15/128). Long-term follow-up results showed that there was no significant difference ( P  > 0.05) between the two groups in terms of the 3- or 5-year overall survival.    Conclusions  The modified technique of transanal specimen extraction in the laparoscopic anterior rectal resection fulfilled the principle of no-neoplasm touch technique, with advantages, such as minimal trauma, rapid recovery, and fewer complications. Long-term follow-up results also showed satisfactory oncological outcomes.

bmc surgery

A modified technique of transanal specimen extraction in the laparoscopic anterior rectal resection for upper rectal or lower sigmoid colon cancer: a retrospective study