The elusiveness and importance of bladder diverticula in children.

Diverticula of the bladder are due to congenital areas of weakness in its wall. Their relationship to ureteral reflux makes them important to discover, yet due to their dynamic nature they can be elusive on uroradiologic studies and at cystoscopy. Fluoroscopically monitored voiding cystourethrography is the most efficient method of detection but even this examination has false negatives.