DefinitionImperforate anus repair is surgery to correct a birth defect involving the rectum and anus.An imperforate anus defect prevents most or all stool from passing out of the rectum.See also: Imperforate anusAlternative NamesAnorectal malformation repair; Perineal anoplasty; Anorectal anomaly; Anorectal plastyDescriptionHow this surgery is performed depends on the type of imperforate anus. The procedures are done under general anesthesia, which means the infant is asleep and feels no pain during the procedure.For mild imperforate anus defects:The first step involves enlarging the opening where the stool drains so stool can pass more easily.Surgery involves closing any small tube-like openings (fistulas), creating an anal opening, and putting the rectal pouch into the anal opening. This