Abstract
Introduction
Anal canal duplication (ACD) is an extremely rare congenital intestinal anomaly. ACD is defined as a second anal orifice located posterior to the true anus ending blindly without connection to the rectum. Usually, there are no other accompanying hindgut pathologies. Patients are often asymptomatic and apply to clinics with their parent’s attention.
Case 1
A 9-month-old girl was referred to our clinic because of a second orifice posterior to the true anus. On the physical examination, there was a 3 mm in diameter orifice, about 0.5 cm behind the anus, at 6 o’clock direction on the lithotomy position. Duplicated lumen was checked with a metal catheter; it was about 2 cm in length ending blindly without connection to the rectum. A prediagnosis of ACD was made and the patient was operated. Duplicated segment was excised totally. Postoperative course was uneventful.
Case 2
One-year-old girl was referred to our clinic because of the same complaint. On the physical examination, there was a 2 mm in diameter orifice, about 0.3 cm behind the anus, at 6 o’clock direction on lithotomy position. Duplicated lumen was checked with a metal catheter; it was about 1.5 cm in length ending blindly without connection to the rectum.
Conclusion
ACD is a rare congenital intestinal anomaly located posterior to the anus. It can be confused with other types of anorectal pathologies, such as hemorrhoids, fistula-in-ano, and perianal abscess at the time of diagnosis. Although ACD is often asymptomatic, it should be removed surgically because of the risk of inflammatory complications and colloidal cancer.
References
Choi SO, Park WH (2003) Anal canal duplication in infants. J Pediatr Surg 38:758–762
Dukes CE, Galvin C (1956) Colloid carcinoma arising within fistulae in the anorectal region. Ann R Coll Surg Engl 18:246–261
Hamada Y, Sato M, Hioki K (1996) Anal canal duplication in childhood. Pediatr Surg Int 11:577–579
Jacquier C, Dobremez E, Piolat C et al (2001) Anal canal duplication in infants and children—a series of 6 cases. Eur J Pediatr Surg 11:186–191
Kratz JR, Deshpande V, Ryan DP et al (2008) Anal canal duplication associated with presacral cyst. J Pediatr Surg 43:1749–1752
Lisi G, Illiceto MT, Rossi C et al (2006) Anal canal duplication: a retrospective analysis of 12 cases from two European pediatric surgical departments. Pediatr Surg Int 22:967–973
Nievelstein RAJ, van der Werff JFA, Verbbeek FJ et al (1998) Normal and abnormal embryonic development of the anorectum in human embryos. Teratology 57:70–78
Ochiai K, Umeda T, Murahashi O et al (2002) Anal-canal duplication in a 6-year-old child. Pediatr Surg Int 18:195–197
Tiryaki T, Senel E, Atayurt H (2006) Anal canal duplication in children: a new technique. Pediatr Surg Int 22:560–561
van der Putte SCJ (1986) Normal and abnormal development of the anorectum. J Pediatr Surg 21:434–440
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Narcı, A., Dilek, F.H. & Çetinkurşun, S. Anal canal duplication. Eur J Pediatr 169, 633–635 (2010). https://doi.org/10.1007/s00431-009-1094-x
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DOI: https://doi.org/10.1007/s00431-009-1094-x