A ureterocele in which some portion of the ureterocele is situated permanently at the bladder neck or in the urethra. the orifice may be situated in the bladder, at the bladder neck, or in the urethra. (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.)