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* 1. Please list your first name, last name, and email:

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* 2. What is your specialty?

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* 3. Testing for ctDNA is commercially available for patients who have undergone resection of a colorectal cancer

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* 4. A 64 year old male with no comorbidities has undergone resection of a colorectal cancer. Pathology revealed a pT3, pN1b (3/24 LNs) moderately differentiated adenocarcinoma. Post-operative ctDNA was undetectable.

The guideline-recommended next approach for this patient is:

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