Inclusion Criteria:  Patients undergoing a right or extended right-hemicolectomy for colon cancer  Patients able to read and understand danish  Patients able to give informed consent  Patients of Scandinavian ethnicity  Exclusion Criteria:  Previous large bowel resections  Suspicion pre or intraoperatively of disease in the appendix  Tumour <10cm from the appendiceal orifice.  Known inflammatory bowel disease  Immuno-modulation treatment  Neo-adjuvant chemotherapy.  < 18 years of age