Presentation
Work up for flank pain.
Patient Data
Age: 65 years
Gender: Male
From the case:
Renal oncocytoma
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A 30×28 mm partially exophytic hetero enhancing mass with central scar is noted at lower pole of right kidney.
In addition, several subcentimeter simple cortical cysts are seen at kidneys. A 5 mm stone is also noted at lower calyx of right kidney.
The prostate gland is enlarged.
Case Discussion
The patient underwent right renal mass resection and histopathologic evaluation confirms oncocytoma. Small tumors may enhance homogeneously, but usually enhancement is heterogeneous and the mass is larger. Central stellate non-enhancing scar is seen in approximately a third of cases particularly at large masses.
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