RESUMEN
Nine children with total anal incontinence after surgery for anorectal agenesis were successfully operated on by free autogenous muscle transplantation. Skeletal muscles were first denervated and 3 weeks later transplanted to the anal region as a U--sling around the rectum, imitating the normal position and function of the puborectalis muscle. The grafts were placed in contact with the normal muscles of the region to make reinnervation possible. Eight children were completely evaluated after operation. Two years after surgical procedure six children were "continent" and only two were still incontinent, but improved. In these cases the indication for muscle transplantation was not quite correct. The return of the function of the muscle grafts completely changed the lives of these children. The results of this new surgical procedure are encouraging and invite further trials.