Tc-99m DMSA and Tc-99m MAG3 Findings in Crossed Renal Ectopia

A 2-year-old girl with failure to thrive underwent abdominal ultrasound which suggested a single kidney. Tc-99m DMSA imaging revealed a large, irregular reniform-shaped structure in the left abdomen and no activity on the right side. A dynamic study with Tc-99m MAG3 confirmed the presence of crossed renal ectopia with good function of both kidneys.