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Surveillance for patients who have completed neo adjuvant/adjuvant treatment or (T4, N+, poorly differentiated, vascular invasion)

Date after treatmentCEA blood testCT scanMRI scanColonoscopy
3 months
6 months √ (if polyps remaining after initial colonoscopy or if not performed pre-op)  
9 months
12 months √ (rectal) √ (then 2-yearly if Lynch syndrome/BSG guidelines if further polyps)
18 months
24 months √ (rectal)
30 months
36 months √ (rectal)
42 months
48 months
54 months
60 months