Try out PMC Labs and tell us what you think. Learn More. Penile duplication diphallus is an extremely rare disorder. It is almost always associated with other malformations like double bladder, exstrophy of the cloacae, imperforate anus, duplication of the rectosigmoid and vertebral deformities.
Anorectal Malformations (Imperforate Anus): Diagnosis and Treatment
By Stephen Matthews For Mailonline. Doctors have told of their surprise after discovering a Portuguese woman they were examining had two anal canals. The unidentified patient was referred to specialists after enduring two abscesses on her bottom, which both required 'drainage'. Upon closer inspection, medics in Figueria da Foz - 87 miles km south of Porto, saw two holes leaving her anus - instead of the usual one. The year-old woman refused numerous offers of surgery to correct her defect, which medics say she would have been born with.
Back to Health A to Z. An anal fistula is a small tunnel that develops between the end of the bowel and the skin near the anus where poo leaves the body. They're usually the result of an infection near the anus causing a collection of pus abscess in the nearby tissue.
This page has been archived and is no longer updated. I recently attended a meeting between the Dunn and Wessel labs about the evolution of the mouth and anus. A new paper by Mark Martindale and Andreas Hejnol offers a hypothesis on the origin of these very important holes.