Parastomal hernias are randomised to either a conventional stoma formed through the rectus anterior muscle or to the same procedure with the addition of a prophylactic mesh in a sublay position. Randomisation is by opening closed envelopes.~A low-weight,partly absorbable mesh is used. Patients are followed for 5 years. Clinical follow up after one month to register early complications such as wound infection or mesh infection.~Clinical follow up after 12 months to register parastomal herniation, fistula formation, stenosis.~Clinical follow up after 5 years to register parastomal herniation, fistula formation, stenosis. At this clinical follow up radiologic examination is added.
Parastomal hernias are randomised to either a conventional stoma formed through the rectus anterior muscle or to the same procedure with the addition of a prophylactic mesh in a sublay position.