Inflammatory Bowel disease (Crohn, Ulcerative colitis) and colorectal cancer are frequent affections and the microbiota plays a major role in their physiopathology involving the immune system. In this setting, the interplay between gut microbiota and brain is still unexplored.~To evaluate the interaction of the microbiota and the immune system with the host in these two chronic diseases, we aim to create a prospective biobank.~A small amount of tissue will be taken during surgery. A whole blood, plasma and stoll samples will also be taken from the patient.~All samples will be anonymized.
Constitution of a biobank of tissues, whole blood and plasma samples and stools to identify markers associated with treatment response, postoperative morbidity including neuro-cognitive and mood complications and prognosis of Inflammatory Bowel disease or colorectal cancer.