What are the long term problems? The new opening created becomes narrow (anal stenosis) in 20-30% requiring dilatation or further revision surgery. Constipation is a problem in 30-40%. Soiling and poor control of stools can be a problem in 30-40%. These problems are more in children with high anomaly and associated spinal problem. There can also be problems with urine control in children with associated spinal defects. Published on Jul 18, 2014Last Updated on Jul 18, 2014