Pelvic cake kidney drained by a single ureter associated with unicornuate uterus.

The pelvic cake kidney in which there is complete fusion of both kidneys into a single renal parenchymal mass has been described as the rarest of renal fusion anomalies. Pelvic cake kidney most commonly drains via 2 separate ureters, with fewer than 10 reports demonstrating a cake kidney drained by a single ureter. We present the first ever reported case of a pelvic cake kidney drained by a single ureter in association with a unicornuate uterus. These findings were identified in a young female patient who underwent pelvic magnetic resonance imaging for pelvic pain.