Renal dromedary hump

Case contributed by Vasileios Rafailidis
Diagnosis certain

Presentation

Incidental finding.

Patient Data

Age: 10 years
Gender: Male
ultrasound

Grey-scale ultrasonography which shows a "dromedary hump" in the left kidney. It results from the pressure of the adjacent spleen.

Doppler demonstrates a normal vascular pattern of the renal cortex within the hump.

Case Discussion

Dromedary hump and Bertini columns are two of the renal pseudotumors.

The term “dromedary hump” or “splenic hump” refers to a bulge in the middle of the lateral surface of the left renal cortex. It is usually created by the pressure of surrounding organs to the cortex of the kidney during development. Although it may resemble to a mass, thorough examination reveals that its echogenicity is similar to that of the rest of the renal parenchyma and calyces extend normally into it.

Color Doppler ultrasonography demonstrates a normal blood flow within this structure 1-5. The same finding can also be shown with e-FLOW and Contrast-enhanced Ultrasonography 4. As dromedary humps represents normal renal tissue, its imaging findings are the same with the rest of the renal cortex in all imaging modalities 5.

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