Ultrasound Quarterly

Skip Navigation LinksHome > December 2009 - Volume 25 - Issue 4 > Sonographic Findings of Ascaris lumbricoides in the Gastroin...
Ultrasound Quarterly:
doi: 10.1097/RUQ.0b013e3181c47a2d
Pictorial Essay

Sonographic Findings of Ascaris lumbricoides in the Gastrointestinal and Biliary Tracts

Wu, Size MMed

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Objective: Ascaris lumbricoides may obstruct bowel, biliary tree, pancreatic ducts, and appendix and induce biliary stones. The purpose of this article was to illustrate typical sonographic findings of A. lumbricoides in the gastrointestinal and biliary tracts.

Methods: Clinical data of 57 patients undergoing sonographic examination with confirmed ascariasis were studied retrospectively, and features of sonographic characteristics of A. lumbricoides in gastrointestinal and biliary tracts were studied.

Results: Sonographic characteristics of A. lumbricoides were single or multiple echogenic nonshadowing linear, tubular structures; curved strips or rodlike with or without echoic tubular central lines; and a spaghettilike appearance, a target sign, or a pseudotumor appearance in the transverse section.

Conclusions: Ascaris lumbricoides in the gastrointestinal and biliary tracts has various features. Sonographic examination in the diagnosis of ascaridiasis has a high value.

© 2009 Lippincott Williams & Wilkins, Inc.



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