Leakage Rate of Ileo-COlic Sutured Anastomosis After Right Hemicolectomy

Inclusion Criteria: * Patients undergoing a primary, elective either open or laparoscopic right hemicolectomy or right extended hemicolectomy due to malignancy with the creation of an intracorporeal or extracorporeal ileo-colic anastomosis. * Either complete hand-sewn anastomosis or partial sutured anastomosis (e.g. combination of stapling and suturing) * Open or laparoscopic as well as conversion from open to laparoscopic surgery * Absence of peritoneal carcinomatosis * Absence of vascular, nervous or bone infiltration * Age ≥ 18 years * Written data protection declaration (Written Informed consent) Exclusion Criteria: * Left hemicolectomy or left extended hemicolectomy or sigma resection * Inflammatory bowel disease (e.g. Crohn´s disease) * Emergency surgery * Previous abdominal surgery with bowel resection * Re-operation of an anastomosis (anastomosis revision surgery) * Need for stoma creation * Non-compliant patients * Participation in an interventional randomized controlled study (RCT)