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<p>Although duplications occur throughout the gastrointestinal tract, anal canal duplication, with 110 cases published worldwide, is an extremely rare congenital malformation and is frequently misdiagnosed as an anal fistula. It presents as an additional opening of the anal canal in the midline at the 6&#xa0;o’clock lithotomy position, without communication with the anorectum and often remains initially asymptomatic. Symptoms can be delayed, so that the diagnosis is sometimes not made until adulthood. The diagnosis is made through a&#xa0;thorough clinical examination and histopathological investigations confirm the suspicion. It is important to rule out associated malformations.</p>

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Good to know: Duplikatur des Analkanals

  • 期刊论文

  • 发表日期：

    2026年7月16日

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  • T. Meyer

摘要

Although duplications occur throughout the gastrointestinal tract, anal canal duplication, with 110 cases published worldwide, is an extremely rare congenital malformation and is frequently misdiagnosed as an anal fistula. It presents as an additional opening of the anal canal in the midline at the 6 o’clock lithotomy position, without communication with the anorectum and often remains initially asymptomatic. Symptoms can be delayed, so that the diagnosis is sometimes not made until adulthood. The diagnosis is made through a thorough clinical examination and histopathological investigations confirm the suspicion. It is important to rule out associated malformations.