Unexpected megarectum: A potential hidden source of complications in patients with anorectal malformation.

Background: Primary posterior sagittal anorectoplasty is recommended to repair anorectal malformations with rectoperineal or rectovestibular fistula. The aim of this study was to identify the impact of the presence of megarectum on the relative frequency of complications related to posterior sagittal anorectoplasty.

Methods: We performed a cross-sectional retrospective study including patients with anorectal malformation, preoperative rectogram and surgically treated with primary or staged posterior sagittal anorectoplasty.