ABSTRACT
Colonic duplications are among the rarest reported. They are frequently diagnosed in infancy and some reports suggest a female predilection. McPherson et al. proposed a simple classification of colonic duplications: type I mesenteric cysts, type II diverticula and the more common type III tubular colonic duplication.82 A number of etiological factors may be involved in the development of the ‘double colon’. The most valid theory suggests division of the hindgut into two parts at a stage during which the anlage possessed a multi-organ developmental potential.82,83 The hindgut anlage normally forms the distal ileum, colon, rectum, bladder and urethra. Division of the anlage at the same initial stage could therefore be responsible for duplication of the lower urinary tract as well.82
