Colonic duplication with recto-urethral fistula: Elusive diagnosis and successful treatment in a resource-limited setting

• Colonic duplication in children can be an elusive diagnosis.
• A variety of radiographic studies may be needed and may be difficult to interpret.
• Colo-urinary fistula may respond to fecal diversion without requiring operative repair.
• Management in a resource-limited setting can still yield positive outcome.

A 3-year-old Ugandan boy presented with 18 months of constipation and 12 months of pneumaturia and fecaluria. Physical exam revealed abdominal distension and a palpable mass anterior to the rectum. Previous contrast enema had been non-diagnostic, and a voiding cystourethrogram (VCUG) had confirmed a recto-urethral fistula. After surgical evaluation, a computed tomography (CT) scan suggested colonic duplication, and a laparotomy was performed for rapidly progressive bowel obstruction. A tubular colonic duplication with fecal impaction was found, necessitating fecal disimpaction and a double divided colostomy. Two months later at re-laparotomy, the septum between the duplicated colonic lumens was found to extend proximally to the mid transverse colon and distally to the upper rectum, and was divided. No urethral fistula was identified, and the colostomy was recreated. At a third operation, the colostomy was reversed. The patient is well at one-year follow up, without evidence of recurrent fistula or stricture. This case shows that colonic duplication in children can be an elusive diagnosis. Often, a variety of radiographic studies may be needed and may be difficult to interpret. In cases with colo-urinary fistula, the fistula may respond to fecal diversion without requiring operative repair. Management in a resource-limited setting can still yield positive outcome.