“Circulating Tumor Cells in Patients With Rectal Cancer”
Objectives: - To establish the rate of circulating tumor cells (CTC) positivity in patients with locally-advanced rectal cancer (LARC), relative to other stages; - To assess changes in detected CTCs associated with neoadjuvant therapy in patients with LARC; - To correlate CTC counts with neoadjuvant treatment response as an indicator of disease risk.
Procedure - Blood Draws
Healthy Participants: Blood (about 2 tablespoons) drawn at 1 time point. Rectal Cancer Participants: Blood (about 2 tablespoons) drawn 1 time before participant starts treatment. Blood also drawn: Just before tumor surgery 1-8 weeks after surgery, or before chemotherapy begins 1-12 weeks after last dose of chemotherapy year after surgery, OR 1 year after completion of treatment if no surgery years after surgery, OR 2 years after completion of treatment if no surgery If the disease gets worse dur ...read more on ClinicalTrials.org
Circulating Tumor Cells in Patients With Rectal Cancer