Presentation
Left flank pain. Left renal mass on ultrasound ?
Patient Data
Hypertrophied column of Bertin at the mid-portion of the left kidney splaying the adjacent calyces and appears isodense to normal parenchyma on non-enhanced CT and enhances uniformly with renal cortex on postcontrast phases, and remain isodense to normal parenchyma on delayed images. The renal outline is preserved.
Case Discussion
CT features typical of hypertrophied column of Bertin that should not be mistaken for renal mass.
Columns of Bertin represent the extension of renal cortical tissue which separates the pyramids and present in ~50% of the healthy population and in 20% are bilateral. They are usually located in the mid-portion of the kidney and are more commonly found on the left side (as in this case).
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