Abstract
Background
Most previous studies of intersphincteric resection (ISR) adopted a two-stage procedure involving abdominal and transanal approaches. We performed completely abdominal ISR via open and a robot-assisted (RA) approaches as treatments for lower rectal cancer (LRC). The RA approach might enable deep dissection and facilitate ISR in patients with restrictive pelvic anatomy.
Methods
A consecutive cohort of 222 LRC patients who underwent completely abdominal ISR (RA ISR, n = 108; open ISR, n = 114) was enrolled prospectively, and their short-term outcomes were evaluated.
Results
In a multivariate analysis, ISR was performed more frequently in the RA than in the open group (82.6 vs. 67.9 %, p = 0.008). The number of harvested lymph nodes was >12 in both groups. A positive distal resection margin was not observed in either group, and a positive circumferential resection margin was found in one patient in the RA group. Overall morbidity did not differ between the groups. Moderate to severe sexual dysfunction occurred 2.7-fold more frequently in the open group (p = 0.023) among male patients ≤65 years. Mean Wexner’s fecal incontinence scores at postoperative months 6 and 12 were greater in the open group than in the RA group (p < 0.05).
Conclusions
Completely abdominal ISR may be feasible in the treatment of LRC, based on a short-term study. Furthermore, RA ISR had equivalent oncological outcomes and slightly improved functional recovery relative to open ISR.
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Acknowledgments
This study was supported by Grants (to J.C. Kim) from the Asan Institute for Life Sciences (2013-069 and 9-490), the Korea Research Foundation (2013R1A2A1A03070986), Ministry of Science, ICT, and Future Planning, and the Korea Health 21 R&D Project (HI06C0868 and HI13C1750), Ministry of Health, Welfare, and Family Affairs, Republic of Korea. We gratefully acknowledge the expert assistance of M. J. Yoon and Y. J. Yoon.
Disclosures
Drs. J. C. Kim, S.-B. Lim, Y. S. Yoon, I. J. Park, C. W. Kim, and C. N. Kim have no conflicts of interest or financial ties to disclose.
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464_2014_3509_MOESM1_ESM.tif
Supplementary Fig. 1A The 6 ports are generally used, comprising one assistant port. The 12 mm camera port is placed about 1 cm right and cephalad to the umbilicus and a 0° camera is utilized during the entire procedure. B Completion of docking the cart with arms (1–3) in their respective position. AP ports used during abdominopelvic procedure, P ports used during pelvic procedure, MCL mid-clavicular line, SUL spino-umbilical line. (TIFF 6,084 kb)
Supplementary Video-clip 1 An operation view of the completely abdominal intersphincteric resection in a 40-year-old male patient with lower rectal cancer. (WMV 93,271 kb)
Supplementary Video-clip 2 The final procedure using laparoscopy-assisted double stapling anastomosis after completely abdominal intersphincteric resection in a 70-year-old female patient with lower rectal cancer. (WMV 30,188 kb)
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Kim, J.C., Lim, SB., Yoon, Y.S. et al. Completely abdominal intersphincteric resection for lower rectal cancer: feasibility and comparison of robot-assisted and open surgery. Surg Endosc 28, 2734–2744 (2014). https://doi.org/10.1007/s00464-014-3509-7
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DOI: https://doi.org/10.1007/s00464-014-3509-7