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Neoadjuvant chemo-radiotherapy for cT3N0 rectal cancer: any benefit over upfront surgery? A propensity score-matched study

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International Journal of Colorectal Disease Aims and scope Submit manuscript

Abstract

Purpose

Benefits of neoadjuvant chemo-radiotherapy (CRT) are well known for locally advanced and/or node-positive rectal cancer, but the best timing for CRT has been less explored for cT3N0 patients. The aim of the present study was to compare the 5-year disease-free survival (DFS) probability between neoadjuvant CRT and upfront surgery in patients affected by cT3N0 rectal cancer.

Methods

A retrospective review of 105 patients affected by cT3N0 rectal cancer, staged by pelvic magnetic resonance imaging and treated at the National Cancer Institute of Milan between 2011 and 2017, was performed: 42 (40.0%) were treated by neoadjuvant CRT and 63 (60.0%) by upfront surgery. Propensity score matching was performed to avoid selection bias, and Cox multivariate regression was used to analyze outcomes.

Results

The 5-year DFS probability was 87.5% in neoadjuvant CRT patients vs. 90.0% in upfront surgery cases (Log-rank p = 0.76). The 5-year loco-regional recurrence-free survival probability was respectively 96.8% vs. 96.3% (Log-rank p = 0.954). On multivariate analysis, neoadjuvant CRT had no impact on DFS when compared to upfront surgery (adjusted HR 0.71, 95%CI 0.18–2.70, p = 0.613), but 61.9% of upfront surgery cases were treated by adjuvant chemo-radiation (adjusted HR 0.41, 95%CI 0.11–1.57, p = 0.196). The only independent predictor of improved DFS was age at diagnosis (adjusted HR 0.95, p = 0.017).

Conclusion

CRT should be considered for cT3N0 patients, but its timing (neoadjuvant vs. adjuvant) seems not to affect the disease-free survival in the present cohort of patients.

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Authors and Affiliations

  1. Colorectal Surgery Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, 20133, Milan, Italy

    Luca Sorrentino, Marcello Guaglio, Luigi Battaglia, Giuliano Bonfanti, Marco Vitellaro, Alessandro Cesa Bianchi & Filiberto Belli

  2. Pathology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Venezian 1, 20133, Milan, Italy

    Massimo Milione

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  1. Luca Sorrentino
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  2. Marcello Guaglio
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  3. Luigi Battaglia
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  4. Giuliano Bonfanti
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  6. Alessandro Cesa Bianchi
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  7. Massimo Milione
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Correspondence to Marcello Guaglio or Filiberto Belli.

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Sorrentino, L., Guaglio, M., Battaglia, L. et al. Neoadjuvant chemo-radiotherapy for cT3N0 rectal cancer: any benefit over upfront surgery? A propensity score-matched study. Int J Colorectal Dis 34, 2161–2169 (2019). https://doi.org/10.1007/s00384-019-03446-4

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  • DOI: https://doi.org/10.1007/s00384-019-03446-4

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