Robert L. Lebowitz, M.D. Children' s Hospital, Harvard Medical School Boston, Massachusetts

This 5-year-old girl was noted to be wet every day and every night. Her panties were always damp. An ultrasound exam showed a solitary right kidney (Figure 1). No kidney was seen on the left (Figure 2). And IVP showed a normal right kidney with a single collecting system. On the left was a tiny, slightly ectopic, poorly functioning kidney with a nondialated ureter (Figure 3). This ureter ended ectopically, outside the bladder and below the sphincter and was the cause of her wetting