Computed tomography (CT) scan of Fasciola hepatica

The CT scan of the liver reveals a focal cluster of variably sized hypodense lesions surrounding the porta hepatis in segment IV and V. The lesions are noted in image A and magnified in image B. The lesions (double arrow) are round to oval in shape and are associated with regional adenopathy (arrow). In addition, characteristic linear tracts extending along the portal triads are noted in image C and magnified in image D (arrowheads). The tracts reflect the migration of the parasites. The findings are characteristic of Fasciola hepatica.