A rare case of ascariasis in the gallbladder, choledochus and pancreatic duct.

Due to the anatomical characteristics of the biliary tract, Ascaris lumbricoides rarely settles in the gallbladder, which makes biliary ascariasis a rare clinical condition. Ultrasonography plays a significant and practical role in the diagnosis and follow-up of suspected cases of biliary ascariasis. The 15-year-old case presented herein had been complaining of abdominal pain and dyspepsia for three months, and the clinical and laboratory findings for the patient indicated acute abdomen. Abdominal ultrasonography showed worms consistent with Ascaris inside a normal-sized gallbladder, dilated choledochus and the pancreatic duct. We started antiparasitic treatment in the patient, with cholangitis and pancreatitis diagnoses. Post-treatment follow-up ultrasonography showed a normal gallbladder, choledochus and pancreatic duct.