18 F-FDG PET/CT in a Patient With Bilateral Perinephric Myxoid Pseudotumor of Fat.

Liao, Xuhe; Fu, Zhanli · Clin Nucl Med · 2026

case_report · Level V

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Abstract

A 62-year-old man with an 18-month history of nephrotic syndrome secondary to focal segmental glomerulosclerosis presented with bilateral perirenal masses. Contrast-enhanced CT scan revealed the large perirenal lesions encasing both kidneys and extending into the renal sinuses, with mild progressive enhancement and no cortical invasion. PET/CT showed a mild to moderate 18 F-FDG avidity. Core needle biopsy of the lesion confirmed the diagnosis of perinephric myxoid pseudotumor of fat.

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