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Sonographic Findings of Ascaris lumbricoides in the Gastrointestinal and Biliary Tracts

Wu, Size MMed

Ultrasound Quarterly:
doi: 10.1097/RUQ.0b013e3181c47a2d
Pictorial Essay
Abstract

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.

Author Information

Radiologist-in-Charge, Department of Ultrasound, the Affiliated Hospital of Hainan Medical College, Haikou, China.

Received for publication August 19, 2009; accepted October 4, 2009.

Radiologist-in-Charge, Department of Ultrasound, the Affiliated Hospital of Hainan Medical College, Haikou, China.

The author has disclosed that neither they nor their spouse/partner have no relevant relationship with or financial interest in any commercial company in any amount pertaining to this educational activity.

All staff in a position to control the content of this CME activity have disclosed that neither they nor their spouse/partner have no financial relationshipswith, or financial interests in, any commercial companies pertaining to this educational activity.

Reprints: Size Wu, Department of Ultrasound, the Affiliated Hospital of Hainan Medical College, No. 31, Longhua Rd, Haikou 570102, China (e-mail: wsz074@yahoo.com.cn).

© 2009 Lippincott Williams & Wilkins, Inc.