Sigmoid Vaginoplasty with a Modified Single Monti Tube: A Pediatric Case Series

Purpose: No consensus exists regarding the most effective procedure for neovagina formation. We describe our experience with modified single Monti tube colovaginoplasty in pediatric patients with disorders of sexual differentiation.Materials and Methods: Six patients were retrospectively identified who underwent primary sigmoid vaginoplasty with a modified single Monti tube between 2009 and 2012. Data were collected from patient charts. The procedure is performed by isolating an 8 to 10 cm segment of distal sigmoid colon or proximal rectum, which is detubularized along the anterior mesentery, folded and retubularized longitudinally, leaving the mesentery in a cephalad position. A channel is dissected in the pelvis to accommodate the neovagina.Results: Mean patient age was 12.7 years (range 6 to 17). The primary diagnosis was androgen insensitivity in 3 cases (50%), and Mayer-Rokitansky syndrome, partial androgen insensitivity and persistent cloaca in 1 each (16.7%). Chromosomal analysis revealed 46XY in 4...