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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 √ √