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Renal dromedary hump

Case contributed by Dr Vasileios Rafailidis

Presentation:

Incidental finding.

Patient Data:

Age: 10-years-old
Gender: Male
Race: Caucasian
Modality: Ultrasound

Ultrasonography of the left kidney showing a "Dromedary hump".

Case Discussion:

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

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.

Colour 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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