The research study procedures include screening for eligibility and the collection of data and biospecimens. Non-operative management is offered as part of routine clinical care.~It is expected that up to 60 participants will be enrolled, with the goal that 55 participants will take part in this research study .~Participants enrolled on the study will remain on study for up to 60 months.
This prospective observational, non-therapeutic study for patients with T3, T4, or node positive rectal cancer eligible to undergo total neoadjuvant therapy.~This research study involves the collection of data and biospecimens (blood and tissue) to see if the presence of circulating tumor DNA (genetic material) ctDNA will help monitor rectal cancer more closely and potentially detect a recurrence before routine scans, performed per standard of care~C2i Genomics, a biotechnology company, and the Spier Foundation are supporting this research study by providing funding for the study.