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Dromedary hump

Case contributed by James Shin
Diagnosis not applicable
ultrasound

Focal bulge in the mid-pole of the left kidney. It can be mistaken for a renal mass but, on closer inspection, mimics the renal cortex in every respect.

Case Discussion

Dromedary hump is named after the camel of the same name. The focal bulge in the renal cortex, albeit striking in appearance, is just a focal bulge of normal cortex due to the splenic impression on the superolateral left kidney. It is a variant not uncommonly identified.

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