Ano-urethral fistula, a special type of anomaly: report of two cases.

Two cases of an ano-urethral fistula, being a low malformation, are reported herein. Both patients underwent a colostomy under the diagnosis of a recto-urethral fistula during the neonatal period. As a urethro-rectogram later revealed the fistula to be located between the anus and anterior urethra, revision of the urethral fistula and an anoplasty were performed through the perineal approach. It is very difficult to establish a correct diagnosis of an ano-urethral fistula at the initial stage of treatment, but we found the urethro-rectogram invaluable in this regard. This type of malformation can be treated through the perineal approach, while the additional anterior perineal incision is very helpful for revising the urethral fistula.