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We report two cases of congenital prepubic sinus (CPS) and discuss theories about its embryology and the etiology of its variants to improve the global understanding of this uncommon anomaly. Based on a review of the scant number of reported cases and our own experience, we postulate that CPS may be caused by a residual cloacal membrane and umbilicophallic groove and that its depth may determine the position of its ending.

Rectal atresia is a rare condition in which the anus and sphincter muscles are normally developed, with usually no fistulous communication with the urinary tract. An unusual case of rectal atresia associated with recto-bulbar urethral fistula treated by a combination of colo-anal anastomosis and mucosal proctectomy via a posterior sagittal approach is reported for the first time.