Renal oncocytoma CT

Renal oncocytoma Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

CT scan may be helpful in the diagnosis of renal oncocytoma.

CT

On abdominal CT scan, renal oncocytoma is characterized by a large well demarcated tumor.

Non contrast

• Homogenous attenuation: If tumor size is less than 3 cm
• Heterogenous attenuation: If tumor size is more than 3 cm
• Perinephric fat-stranding may be present due to edema
• Calcification may be present

Post contrast

• Small tumors may enhance homogeneously, but usually enhancement is heterogenous and the mass is larger
• Central stellate non-enhancing scar is seen in approximately a third of cases
• Renal vein thrombosis may be present, but tumour thrombus is absent