The role of magnetic resonance tumour regression grade in the prediction of regression and survival of rectal adenocarcinoma after long-course chemoradiotherapy: a cohort study.

Unlabelled: Rectal cancer response to neoadjuvant long-course chemoradiotherapy (LCCRT) is assessed by magnetic resonance tumour regression grade (mrTRG) and this has an impact on surgical management. However, there is limited data on the correlation between mrTRG and pathological tumour regression grade (pTRG). This study aims to evaluate the correlation between mrTRG and pTRG and the prognostic value of mrTRG on survival.