Isolated congenital megacystis without intestinal obstruction: a mild variant of chronic intestinal pseudoobstruction syndrome?

Megacystis is frequently involved with chronic intestinal pseudoobstruction syndrome; however, isolated megacystis without intestinal obstruction is extremely rare. We present the case of a female patient with isolated congenital megacystis without severe intestinal obstruction. In this case, barium enema did not reveal any significant findings; however, histologic evaluation of her rectum showed hypoganglionosis of the submucous and myenteric plexuses. These findings indicate that this case may be a mild variant of chronic intestinal pseudoobstruction syndrome. The presence of megacystis should alert the physician to the possibility of chronic intestinal pseudoobstruction syndrome.