Dromedary Hump

  • Etiology: Normal variant of renal contour due to splenic impression onto superolateral left kidney
  • Imaging: Prominent focal bulge on lateral border of left kidney
  • Imaging DMSA scan: Used to demonstrate normal radiotracer uptake in the suspicious region thus ruling out tumor
  • DDX: Renal tumor
  • Complications:
  • Treatment: None
  • Clinical:

Radiology Cases of Dromedary Hump

Ultrasound of dromedary hump
US of the left kidney (below) shows a prominent focal bulge on its lateral border that is not present on the lateral border of the right kidney (above).
US of pediatric dromedary hump of kidney
US of the left kidney (below) shows a prominent focal bulge on its lateral border that is not present on the lateral border of the right kidney (above).
US of dromedary hump of the kidney
Sagittal US of the left kidney (above) shows a prominent focal bulge on the lateral (superior in this image) border of the left kidney. Sagittal US of the right kidney (below) shows a normal renal contour.