Anorectal duplications account for only 5% of gastrointestinal duplications, and cases with involvement of the anal canal are much rarer. Nearly all anorectal duplications are posterior to the rectum; duplications located anterior to the normal rectum are highly unusual, and only a few cases have been reported. We report the case of an anterior anorectocolonic duplication presenting as a rectovaginal fistula in a 2-month-old infant. After diagnosis, the duplication was excised completely without further intestinal complications.

Segmental dilatation of small intestine is a rare form of the congenital intestinal anomaly. Many other congenital anomalies have been reported in these patients, but to our knowledge, the association with colonic duplication has not been reported in literatures. We report a case of segmental dilatation of distal ileum associated with colonic duplication. The main clinical and pathogenic aspects are discussed, and the literatures were reviewed.