We report on an uncommon case of a ureterocele arising from the lower-pole
ureter in a duplex system. To our knowledge, this represents the 3rd such c
ase reported in the English literature. Ultrasonography and retrograde pyel
ogram established the diagnosis, The patient underwent a left upper-pole ne
phroureterectomy with excision of the ureterocele and cross-trigonal ureter
al reimplantation, Copyright (C) 2000 S. Karger AG, Basel.