Hepatic hydatid cyst
Work up for abdominal pain.
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A 6 × 4.5 cm cystic lesion with incomplete marginal calcification is present in the right hepatic lobe. The lesion has inhomogeneous internal density and shows no obvious enhancement on post-contrast images.
A few non-enhanced simple cortical cysts are seen in both kidneys.
Uncomplicated distal colonic diverticulosis is present.
The prostate gland is enlarged and its central portion protrudes cephalad into the urinary bladder base.
Degenerative changes as osteophytes are seen at the lumbar spine.
Features on CT scan are typical for hepatic hydatid cyst.
Hydatid cyst occurs secondary to infection by Echinococcus spp. It is most commonly seen involving the liver, followed by lungs and spleen.