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Surveillance for patients without adjuvant treatment (T1/2/3 N0 M0, well/moderately differentiated and no vascular invasion)

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