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2005 ASCO Guidelines for post-treatment surveillance[6]
| Year post diagnosis | History and physical review | CEA level | CT scan chest and abdomen | Colonoscopy |
| Yr 1 | 3-6 monthly | 3 monthly | Yearly | |
| Yr 2 | 3-6monthly | 3 monthly | Yearly | |
| Yr 3 | 3-6 monthly | 3 monthly | Yearly | Colonoscopy |
| Yr 4 | 6 monthly | At review | Nil | |
| Yr 5 | 6 monthly | At review | Nil |
CEA: Carcinoembryonic antigen.
