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International Journal of Colorectal Disease

, Volume 33, Issue 10, pp 1383–1391 | Cite as

The potential benefit of adjuvant chemotherapy in locally advanced rectal cancer treated with neoadjuvant chemoradiotherapy is not predicted by tumor regression grade

  • Ali Bohlok
  • Alain Hendlisz
  • Fikri Bouazza
  • Maria Gomez Galdon
  • Jean Van de Stadt
  • Luigi Moretti
  • Issam El Nakadi
  • Gabriel Liberale
Original Article
  • 101 Downloads

Abstract

Introduction

Recommended treatment for locally advanced rectal cancer (LARC) is neoadjuvant chemoradiotherapy (NACRT) followed by surgery and total mesorectal excision (TME). The role of adjuvant chemotherapy (ACT) in this regimen is still debated. Assessment of Dworak’s tumor regression grade (TRG) after NACRT could potentially select patients who might benefit from ACT.

Materials and methods

Data for patients who underwent NACRT and TME for LARC between 2007 and 2014 were retrieved from the Bordet Institute database. Overall survival (OS) and disease-free survival (DFS) were calculated for the whole population, according to whether or not they received ACT, and according to TRG.

Results

We included 74 patients (38 males) with a median age of 62.7 years (33–84 years). AJCC stage cIIIb disease was the most frequent (73%). Pathologic complete response (pCR) was achieved in 13 patients (17.6%). ACT was administered to 42 patients (56.8%). Five-year OS and DFS of patients who received ACT or not were 92 and 84.5% (p = ns), and 79.9 and 84.8% (p = ns), respectively. OS was related to TRG (cut-off value of 3) (p = 0.001). ACT administration was not correlated with improved outcomes in any TRG groups.

Conclusion

TRG is a prognostic factor for both OS and DFS but does not appear to have a significant benefit for the selection of patients with LARC treated with NACRT who might benefit from the administration of ACT. Prospective randomized trials with larger populations are needed to identify factors that predict which patients may benefit from the administration of ACT.

Keywords

Rectal cancer Neoadjuvant chemoradiotherapy Tumor regression grade Dworak Overall survival Disease-free survival 

Notes

Acknowledgements

We would like to acknowledge Dr. Mariana Brandao (MD) for her help with statistical analysis, and for her support and encouragement to write the manuscript. We would like to acknowledge the contribution of a medical writer, Sandy Field, PhD, for preparation and formatting of this manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Surgical Oncology, Institut Jules BordetUniversité Libre de BruxellesBrusselsBelgium
  2. 2.Department of Gastro-enterology, Institut Jules BordetUniversité Libre de BruxellesBrusselsBelgium
  3. 3.Department of Pathology, Institut Jules BordetUniversité Libre de BruxellesBrusselsBelgium
  4. 4.Department of Radiation Oncology, Institut Jules BordetUniversité Libre de BruxellesBrusselsBelgium

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