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MRI restaging of rectal cancer: The RAC (Response-Anal canal-CRM) analysis joint consensus guidelines of the GRERCAR
Stephanie Nougaret1, Pascal Rousset2, Doenja M J Lambregts3
1Department of Radiology IRCM, Montpellier Cancer Research Institute, 34000 Montpellier, France; INSERM, U1194, University of Montpellier, 34295, Montpellier, France.
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.
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