case_images: PMC9990424_01
case_images: Magnetic resonance venography of the kidneys demonstrating marked narrowing and poor opacification of the renal veins bilaterally with perinephric venous collaterals. A: Axial T1 fat-saturated image obtained 5 minutes following contrast administration demonstrates diffuse narrowing and irregularity of the right renal vein (white arrow) and the presence of bilateral perinephric collateral veins (black arrow). B: Coronal volumetric interpolated breath-hold examination (VIBE) image obtained 6 minutes following contrast administration demonstrates narrowing and irregularity of the distal left renal vein (white arrow).
case_images: CNCS-11-039-01.jpg
case_images: PMC9990424_01_CNCS-11-039-01.jpg
case_images: Figure1
case_images: Magnetic resonance venography (MRV) (Figure 1) revealed markedly narrowed bilateral renal veins with poor contrast opacification.
case_images: Computed tomography angiography of the kidneys demonstrating bilateral renal vein thrombosis and perinephric venous collaterals. A: Axial contrast-enhanced image demonstrates a filling defect in the distal right renal vein (black arrow) and bilateral perinephric collateral veins. There is left-sided hydronephrosis with increased density in the left renal pelvis likely representing hemorrhage. B: Coronal contrast-enhanced image demonstrates a filling defect within the proximal left renal vein (black arrow) and bilateral perinephric collateral veins (white arrow).
case_images: CNCS-11-039-02.jpg
case_images: PMC9990424_01_CNCS-11-039-02.jpg
case_images: Figure2
case_images: After pre-hydration with 1 L of normal saline, the patient underwent a contrast-enhanced CT of the abdomen (Figure 2), which demonstrated filling defects in the renal veins bilaterally consistent with acute thrombus and marked attenuation of the distal left renal vein. 