- NOTE: Patients may sign consent and be registered for this protocol prior to completion of assessment of criteria 6.1.1 and 6.1.2, (assuming all other eligibility criteria are met) so that endocolonic ultrasound and biopsy may be performed on study; as these procedures may be necessary to determine TNM staging and/or histopathology; however criteria 6.1.1 and 6.1.2 must be successfully met prior to patient receiving chemotherapy on this trial.