A symptomatic child with ceftriaxone-associated biliary pseudolithiasis.

A 5-year-old boy who had pneumonia was treated in a neighboring hospital. Ceftriaxone was administrated 2 g/day divided into two equal intravenous doses. After 1 week of ceftriaxone therapy, the patient developed abdominal pain. In our hospital, an abdominal sonogram showed a hyperechoic band with postacoustic shadow within the collapsed gallbladder. He was diagnosed with ceftriaxone-associated biliary pseudolithiasis, and ceftriaxone therapy was ceased. On the 8th our hospital day, he again complained of right abdominal pain after supper. A sonogram revealed high-amplitude echoes within the gallbladder neck and common bile duct. Furthermore, bile duct dilatation was observed. He was managed conservatively, after which the symptoms were resolved. On the 11th day, a sonogram showed only sludge within the gallbladder, and on the 13th day, he was discharged from our hospital. It is important for sonographers to recognize the possible occurrence of biliary pseudolithiasis in ceftriaxone-treated patients, especially when a high dose is used in children.