Biliary ascariasis: ultrasonography, endoscopic retrograde cholangiopancreatography, and biliary drainage

Gastroenterology. 1986 Sep;91(3):730-2. doi: 10.1016/0016-5085(86)90646-3.


Roundworms migrating into the biliary tract are a relatively common cause of biliary symptoms in areas where the parasite is endemic. Visualization of worms by conventional radiologic methods is often unsatisfactory, whereas ultrasonography offers a rapid, safe, and noninvasive approach to the diagnosis. Using real-time ultrasonographic scanning we demonstrated for the first time the characteristic morphology of the worms in a patient with biliary ascariasis. In addition, the motility of the worms in the biliary tract could be confirmed. Ultrasonography is also a convenient method for the follow-up of patients. Endoscopic biliary drainage and instillation of piperazine citrate through a nasobiliary drain is a logical therapy and was used successfully in this patient.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Ascariasis / diagnosis*
  • Ascariasis / diagnostic imaging
  • Ascariasis / drug therapy
  • Ascariasis / surgery
  • Biliary Tract Diseases / parasitology*
  • Cholangiopancreatography, Endoscopic Retrograde*
  • Drainage*
  • Humans
  • Male
  • Piperazines
  • Ultrasonography*


  • Piperazines
  • piperazine citrate