Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.
From the case:
Horseshoe kidney

Both kidneys join together through their lower poles at midline, in keeping with horseshoe kidney.
DMSA

Both kidneys show good radiotracer uptake, connected through their lower poles on midline, in keeping with horseshoe kidney.
Case Discussion
Typical appearance of horseshoe kidney on Tc-99m DMSA renal scan and ultrasound.