Modified technique for parastomal hernia repair in patients with intractable stoma-care problems

Although stoma relocation is generally the first choice of treatment for parastomal hernia, a repair using polypropylene prosthetic mesh is sometimes employed in cases of parastomal hernia recurrence. Use of this mesh, however, has been associated with a high risk of bowel erosion, adhesions formation, and fistulization. We therefore began to use expanded polytetrafluoroethylene (ePTFE) mesh to perform an onlay parastomal hernia repair. Our initial clinical experience with this procedure is described.

Sixteen patients aged 39-70 years with intractable stoma problems underwent a modified intra-abdominal onlay technique with implantation of a large (26 x 36 cm) sheet of ePTFE mesh.

During a median follow-up of 29 months (range, 5-52 months), no mesh-related bowel erosion, fistulization, or adhesion formation were observed. Two patients had a recurrence of the hernia due to technical failure. Re-operation in one of these resulted in wound dehiscence and removal of the contaminated mesh. Another patient developed intestinal obstruction postoperatively. The mesh was removed, and a gastrointestinal stromal tumour was found. Finally, a nonmesh related small bowel erosion required removal of the mesh in one patient. All other patients had full relief of symptoms.

The modified onlay technique using a large sheet of ePTFE prosthetic mesh is a feasible option for treatment of parastomal hernia recurrence. Possible advantages of the procedure include stoma preservation, strengthening of the abdominal wall, and a reduced risk of recurrence, contamination, fistulization, and bowel adhesions and erosion.