Ceftriaxone, a third-generation cephalosporin, is known to induce reversible precipitations
in the gallbladder of children. In general, radiologic signs and symptoms will develop
after 9-11 days of treatment. The authors report a case where 48 h of therapy were
sufficient to develop a biliary pseudolithiasis. Clinicians and radiologists should
be aware of this complication which mimics true cholelithiasis.