The Utility and Feasibility of Mt-sDNA as a Surveillance Procedure in Colorectal Cancer Survivors

Inclusion Criteria: * Diagnosis of stage I, II or III adenocarcinoma of the colon or rectum * Receipt of preoperative colonoscopy * Receipt of bowel resection; use of adjuvant chemotherapy or radiation therapy as clinically indicated Exclusion Criteria: * Stage IV colorectal cancer * Surgical treatment with subtotal colectomy or total proctocolectomy * Diagnosis of inflammatory bowel disease (ulcerative colitis or Crohn's disease) * Diagnosis of polyposis syndrome including Lynch syndrome or familial polyposis * Presence of advanced adenomas (1 cm or larger, villous features and/or high grade dysplasia) that were not removed at the preoperative colonoscopy or contained in the resection specimen. * Inability to provide informed consent * Inability to understand spoken and written English * Medical comorbidities that would be contraindications to sedation or that would preclude any benefit of routine surveillance post-resection. These would be at the discretion of the participant's providers.