Using funnel-shaped mesh during rectal adenocarcinoma surgery cuts parastomal hernias significantly.

• At 3 years, CT-confirmed parastomal hernia occurred in 57% of the mesh group vs. 82% in controls, a 25% reduction.
• Clinically diagnosed hernias were 10% in the mesh group compared to 39% in the control group, marking a 29% difference.

This supports funnel-shaped mesh as a safe option to lower hernia risk post-colostomy.

• Median hernia size was significantly larger in controls (185.9 ml) vs. mesh group (86.8 ml).