Anorectal anomalies--international classification.

80 patients with anorectal anomalies were admitted to the Paediatric Surgical Service of the National Hospital of Norway during the five year period 1970--74. The anomalies were classified according to the International Classification which was found to be of obvious value in comparing material and results. Intermediate and high deformities were generally treated with an initial colostomy and a subsequent sacroperineal pullthrough operation. The low anomalies were generally treated with an anoplasty in two procedures. Patients with poor functional results and incontinence can be improved with free muscle transplantation.