Alternative definition : NICHD: A ureterocele that is located entirely within the bladder, and which may be
associated with a single system, with the upper pole ureter of a completely duplicated
system, or rarely associated with a lower pole ureter. (Adapted from Glassberg KI,
Braren V, Duckett JW, Jacobs EC, King LR, Lebowitz RL et al. Suggested terminology
for duplex systems, ectopic ureters and ureteroceles. J Urol 1984; 132(6):1153-1154.);