Opacification of the Gallbladder by Urographic Contrast Media

This is the authors' abstract. We don't add key points for this paper.

Five cases of opacification of the gallbladder by renographic contrast media are reported. These are added to 7 previous cases found in the literature since the advent of the diatrizoate class of contrast agents. The precise mechanisms underlying this phenomenon are unknown, but pertinent biochemical and physiologic considerations are discussed. An apparently significant association between heterotopic biliary excretion and acute unilateral ureteral obstruction in the presence of a contralateral normal kidney and normal renal function tests is presented for the first time.