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Sonography of hepatobiliary ascariasis
Journal of Clinical Ultrasound : JCU
|June 1, 1996
Summary
Hepatobiliary ascariasis can be diagnosed using real-time ultrasound, revealing specific signs like the "impacted worm" sign. This parasitic infection in the bile ducts requires inclusion in differential diagnoses for intraluminal bile duct masses.
Area of Science:
- Medical Imaging
- Parasitology
- Gastroenterology
Background:
- Hepatobiliary ascariasis is a parasitic infection affecting the liver and biliary system.
- Accurate and timely diagnosis is crucial for patient outcomes.
- Ultrasound is a key imaging modality for abdominal pathologies.
Purpose of the Study:
- To describe the real-time sonographic features of hepatobiliary ascariasis.
- To highlight specific ultrasound signs indicative of biliary ascariasis.
- To emphasize the importance of considering biliary ascariasis in differential diagnoses.
Main Methods:
- Retrospective analysis of 19 surgically confirmed cases of hepatobiliary ascariasis.
- Primary diagnostic tool: real-time ultrasound examination.
- Correlation of sonographic findings with surgical and pathological results.
Main Results:
- Ultrasound accurately diagnosed all 19 cases with no false positives.
- The novel "impacted worm" sign was observed in two patients.
- Macerated worms presented as intraluminal masses in the common bile duct, mimicking cholangiocarcinoma.
Conclusions:
- Real-time ultrasound is highly effective for diagnosing hepatobiliary ascariasis.
- The "impacted worm" sign is a specific sonographic finding.
- Biliary ascariasis should be considered in patients from endemic areas presenting with intraluminal bile duct masses.