Proof-of-concept Study of Blood Markers of Tumor Dissemination in Patients With Versus Without Intestinal Polyps

Inclusion Criteria: * Patient to be examined by colonoscopy * The patient must be a member or beneficiary of a health insurance plan Exclusion Criteria: * The subject is participating in a category 1 interventional study, or is in a period of exclusion determined by a previous study * The subject signals their opposition to participate in the study * It is impossible to give the subject informed information * The patient is under safeguard of justice or state guardianship * Patient pregnant or breastfeeding * History of proven cancerous disease * Patient followed for a chronic inflammatory bowel disease