Paintbrush sign - Intravenous urography
Citation, DOI, disclosures and case data
At the time the case was submitted for publication Mohammadtaghi Niknejad had no recorded disclosures.View Mohammadtaghi Niknejad's current disclosures
Work up for hematuria.
Loading Stack -
0 images remaining
In a non-contrast image, no nephrolithiasis or renal parenchymal calcification could be identified. After contrast media administration, exaggerated stranded enhancement of the medullary pyramids is evident bilaterally, better seen on the zoomed images, resembling a paintbrush sign.
A paintbrush sign on IVU or CT-IVU describes the streaky appearances of dilated contrast filled tubules within the renal medulla, suggesting medullary sponge kidneys or renal tubular ectasia (which the patient was confirmed to have).