ABSTRACT
Answer: (c) CT and MRI are rarely performed in children since renal vein thrombosis can usually be easily diagnosed with ultrasound or MAG3 renal scintigraphy. The classic presentation of renal vein thrombosis is gross hematuria, hypertension, and an enlarged, palpable kidney. In the acute phase, the kidney is enlarged, the parenchyma is diffusely echogenic on ultrasound, and MAG3 scintigraphy revealed reduced or absent uptake with no excretion of the tracer. In the chronic phase, renal function diminishes and the kidney becomes small and remains echogenic, and calcifications may appear within thrombosed intrarenal veins.
