Nonoperative versus operative approach according to the response to neoadjuvant chemoradiotherapy for rectal cancer: A prospective cohort study.

Purpose: To report on organ preservation following chemoradiotherapy (CRT) in a prospective cohort of locally advanced rectal cancer patients.

Methods And Materials: Fifty-two patients received CRT. MRI and F-FDG-PET/CT were performed prior to CRT.