CT

Non-contrast enhanced CT - 5h

Note the presence...
Axial non-contrast
Note the presence of hyperdense content within the gallbladder (red arrow) and how it causes a loss of differentiation between liver parenchyma and gallbladder (yellow arrow). - Persistent nephrogram: It is believed that the contrast medium is retained in the proximal tubular cells by vacuolization.
Modality: CT (non-contrast)

- “ Gallbladder opacification from vicarious excretion may indicate decreased renal function (remember the suspicion of a bladder rupture in our patie...”

View full size version of Vicarious contrast excretion

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