MR findings in human fascioliasis

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Abstract:

Fasciola hepatica is a trematode of herbivorous mammals, and man is infected by accidental ingestion of contaminated raw aquatic vegetables or water. There have been many reports on computed tomographic and cholangiographic features of human fascioliasis. However, findings of magnetic resonance (MR) imaging have not been reported.

Hepatic fascioliasis produces three types of lesions in MR images arranged in tract‐like fashion. The outermost area presents as an iso‐signal area in T1WI, with slightly higher signal intensity in T2WI and diffuse enhancement after i.v. contrast. The second type presents as a well defined low signal area in T1WI, not enhanced, and also shows low signal intensity in T2WI. The third type has low signal intensity in T1WI, is not enhanced, and has high signal intensity in T2WI which is similar to fluid‐containing inflammatory lesions such as pyogenic abscess.

These findings suggest various changes associated with traumatic hepatitis caused by the migration of the worm in the liver. This diverse signal intensity can be a suggestive finding of fascioliasis.

Keywords: abscess; liver; liver parasite

Document Type: Original Article

DOI: http://dx.doi.org/10.1046/j.1365-3156.1996.d01-43.x

Affiliations: Department of Radiology, Seoul National University College of Medicine, Seoul, Korea

Publication date: June 1, 1996

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