Abstract
Background
Randomized controlled trials have been unable to demonstrate noninferiority of minimally invasive surgery for rectal cancer. The aim of this study was to assess oncologic resection success, short- and long-term morbidity, and overall survival by operative approach in a homogenous early-stage rectal cancer cohort.
Methods
This is a multicenter, propensity score-weighted cohort study utilizing deidentified data from the National Cancer Database. Individuals who underwent a formal proctectomy for early-stage rectal cancer (T1-2, N0, M0) from 2010 to 2015 were included. The primary outcome was a composite variable indicating successful oncologic resection stratified by operative approach, defined as negative margins with at least 12 lymph nodes evaluated.
Results
Among 3649 proctectomies for rectal adenocarcinoma, 1660 (45%) were approached open, 1461 (40%) laparoscopically, and 528 (15%) robotically. After propensity score weighting, compared to open approach, there were no differences in odds of successful oncologic resection (ORadj = 1.07, 95% CI 0.9, 1.28 and ORadj = 1.28, 95% CI 0.97, 1.7). Open approach was associated with longer mean (± SD) length of stay compared to laparoscopic (7.7 ± 0.18 vs. 6.5 ± 0.25 days, p < 0.001) and robotic (7.7 ± 0.18 vs. 6.3 ± 0.35 days, p < 0.001) approaches. In regard to 90-day mortality, compared to open approach, laparoscopic (ORadj = 0.56, 95% CI 0.36, 0.88) and robotic (ORadj = 0.45, 95% CI 0.22, 0.94) approaches were associated with a reduced odd of 90-day mortality. This mortality benefit persists in the long-term for laparoscopic approach (p = 0.003).
Conclusion
For individuals with early-stage rectal cancer treated with proctectomy, successful oncologic resection can be achieved irrespective of technical approach. Minimally invasive approaches provide short-term reduction in morbidity. Surgical approach must be tailored to each patient based on surgeon experience and judgement in collaboration with a multi-disciplinary team.
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All authors substantially contributed to the conception of the manuscript. Dr. Kethman acquired and analyzed the data and Drs. Kethman, Dietz, Stein, and Steinhagen aided in the interpretation of the data and analysis. Dr. Kethman was responsible for drafting initial drafts of the manuscript and Drs. Bingmer, Ofshteyn, Charles, Stein, Dietz, and Steinhagen contributed to critically revising important intellectual content. All authors gave final approval of the published version of the manuscript and all agree to be accountable for all aspects of the manuscript.
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Drs. William Kethman, Katherine Bingmer, Asya Ofshteyn, Ronald Charles, and Emily Steinhagen have no conflicts of interest or financial ties, relevant to the material in this manuscript, to disclose. Dr. Sharon Stein has received a Physician’s Foundation grant for work unrelated to the topic of this manuscript and support from Stryker Corporation for travel expenses. Dr. David Dietz has received compensation as faculty for an educational course with Johnson & Johnson – Medical Device Business Services, Inc..
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Kethman, W.C., Bingmer, K.E., Ofshteyn, A. et al. Effects of surgical approach on short- and long-term outcomes in early-stage rectal cancer: a multicenter, propensity score-weighted cohort study. Surg Endosc 36, 5833–5839 (2022). https://doi.org/10.1007/s00464-022-09033-z
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DOI: https://doi.org/10.1007/s00464-022-09033-z