Chimney Trial of Parastomal Hernia Prevention

Exclusion Criteria

• •Abdominoperineal resection or Hartmann's operation by laparotomy or conversion to laparotomy
• •Complication requiring laparotomy during post surgery treatment at surgical ward after APR
• •Patient with a comorbid illness or condition that would preclude the use of surgery (ASA 4-5).
• •Patients with concurrent or previous malignant tumors within 5 years before study enrollment
• •Patients with T4b tumors which impose a multi-organ resection
• •Rectal malignancy other than adenocarcinoma
• •Patient undergoing emergency procedures
• •Planned rectal surgery along with major concomitant procedures (e.g. hepatectomies, other intestinal resections).
• •Metastatic disease with no possibility of curative surgery
• •Pregnant or suspected pregnancy
• •Patients living geographically distant and/or unwilling to return for follow-ups or comply with all study requirements
• •Active abdominal infection at the time of surgery
• •Previous surgery at the colostomy site
• •Language barrier or other reasons why informed consent is not possible