Computed tomography demonstration of renal dysplasia with a vaginal ectopic ureter.

The diagnosis of renal dysplasia associated with a single vaginal ectopic ureter is often difficult, because the dysplastic kidney is usually not seen on excretory urography. A 17-year-old girl, whose affected kidney was accurately identified by computed tomography, is reported. Computed tomography is a useful technique for the diagnosis of renal dysplasia with a single vaginal ectopic ureter.