Amersham

This research aims to improve the accuracy of MRI scans in detecting early-stage rectal cancer and significant rectal polyps. Many patients with early rectal cancer currently undergo major surgery or unnecessary treatments due to inaccurate staging. The study evaluates a new MRI reading method called PRESERVE, which has been shown to identify early rectal cancers more accurately and may allow more patients to have less invasive local excision surgery that preserves the rectum and quality of life. The study compares two phases a control phase where patients receive standard care, and an intervention phase following training of radiologists in the PRESERVE MRI staging method. During the intervention phase, MRI scans are recommended for rectal polyps 20mm or larger or with suspicious features before removal, alongside radiologist training. Each hospital transitions from control to intervention at a randomized time, with no crossover of patients between phases. Participants will be monitored through clinical investigations before, during, and after treatment as per standard care. Researchers will assess the accuracy of tumor staging on MRI, the number of patients identified for rectal preservation surgery, and quality of life outcomes over up to 5 years. Additional measures include scan quality, tumor characteristics, treatment costs, and histopathological biomarkers. The primary outcome is the impact of radiologist training on staging accuracy measured after one year.