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Excretion of intravenous contrast through the hepatobiliary system (vicarious excretion of contrast).
Note the presence of a hyperdense gallbladder with multiple calculi within, some of them not previously visualized due to a lack of calcification in the stone.
Persistent nephrogram and left urethrogram after 24 hours. This finding could help to identify subclinical renal impairment and a higher risk of nephropathy on subsequent exposure to contrast agents. Our patient presented with contrast-induced nephropathy few days later.