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Practice Guideline
. 2023 Jul-Aug;104(7-8):311-322.
doi: 10.1016/j.diii.2023.02.002. Epub 2023 Mar 16.

MRI restaging of rectal cancer: The RAC (Response-Anal canal-CRM) analysis joint consensus guidelines of the GRERCAR and GRECCAR groups

Stephanie Nougaret  1 , Pascal Rousset  2 , Doenja M J Lambregts  3 , Monique Maas  3 , Kirsten Gormly  4 , Oliver Lucidarme  5 , Serge Brunelle  6 , Laurent Milot  7 , Lionel Arrivé  8 , Celine Salut  9 , Franck Pilleul  10 , Constance Hordonneau  11 , Guillaume Baudin  12 , Philippe Soyer  13 , Vanessa Brun  14 , Valérie Laurent  15 , Celine Savoye-Collet  16 , Iva Petkovska  17 , Jean-Pierre Gerard  18 , Eddy Cotte  19 , Philippe Rouanet  20 , Onofrio Catalano  21 , Quentin Denost  22 , Regina Beets Tan  3 , Nora Frulio  9 , Christine Hoeffel  23
Affiliations
Practice Guideline

MRI restaging of rectal cancer: The RAC (Response-Anal canal-CRM) analysis joint consensus guidelines of the GRERCAR and GRECCAR groups

Stephanie Nougaret et al. Diagn Interv Imaging. 2023 Jul-Aug.

Abstract

Purpose: To develop guidelines by international experts to standardize data acquisition, image interpretation, and reporting in rectal cancer restaging with magnetic resonance imaging (MRI).

Materials and methods: Evidence-based data and experts' opinions were combined using the RAND-UCLA Appropriateness Method to attain consensus guidelines. Experts provided recommendations for reporting template and protocol for data acquisition were collected; responses were analysed and classified as "RECOMMENDED" versus "NOT RECOMMENDED" (if ≥ 80% consensus among experts) or uncertain (if < 80% consensus among experts).

Results: Consensus regarding patient preparation, MRI sequences, staging and reporting was attained using the RAND-UCLA Appropriateness Method. A consensus was reached for each reporting template item among the experts. Tailored MRI protocol and standardized report were proposed.

Conclusion: These consensus recommendations should be used as a guide for rectal cancer restaging with MRI.

Keywords: Magnetic resonance imaging; Neoadjuvant therapy; Re-staging; Rectal neoplasms; “Watch-and-wait”.

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Conflict of interest statement

Disclosure of interest The authors have no conflicts of interest to disclose in relation with this article.

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