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)