Prophylactic mesh at end-colostomy construction reduces parastomal hernia rate: a randomized trial

Area of Science:

• Surgical Oncology
• Colorectal Surgery
• Hernia Repair

Background:

• Parastomal hernia (PSH) is a frequent complication following end-colostomy, often necessitating surgical repair.
• Existing surgical repair methods for PSH have shown limited success rates.
• Preventive strategies during initial colostomy formation are needed to mitigate PSH incidence.

Purpose of the Study:

• To evaluate the efficacy of prophylactic retromuscular synthetic mesh in preventing parastomal hernia (PSH).
• To compare the incidence of PSH in patients receiving mesh versus no mesh during end-colostomy formation.
• To assess the long-term clinical outcomes and hernia recurrence rates.

Main Methods:

• A two-center randomized trial involving patients undergoing open pelvic surgery for rectal cancer.
• Patients were randomized to either receive a retromuscular synthetic mesh or no mesh at the time of end-colostomy formation.
• Follow-up included clinical examination and routine CT scans to identify PSH.

Main Results:

• PSH developed in significantly fewer patients in the mesh group (2/32) compared to the no-mesh group (12/26).
• The odds ratio for PSH was 0.04 (95% CI: 0.01-0.30) and the hazard ratio was 0.134 (95% CI: 0.030-0.603) favoring the mesh group (P < 0.001).
• The number needed to treat to avoid one PSH was 2.5 patients; CT confirmed stable fascial orifice size in the mesh group.

Conclusions:

• Retromuscular insertion of synthetic mesh at end-colostomy formation effectively reduces the risk of parastomal hernia.
• Mesh prophylaxis is a viable strategy for preventing PSH in patients undergoing colostomy.
• This approach offers a significant improvement in preventing a common and often problematic complication.