Diagnostic imaging and interventional procedures in a growing problem: Hepatic alveolar echinococcosis

Figure 2 Alveolar echinococcosis in a 34-year-old man. Axial unenhanced computed tomography (CT) image demonstrates an infiltrating tumor-like hepatic mass with irregular margins and heterogeneous contents, including scattered hyperattenuating foci of calcification and areas of hypoattenuation corresponding to necrosis and parasite tissue (A). Alveolar echinococcosis in a 29 year old man. Abdominal CT images obtained after the administration of intravenous contrast medium show a poor enhancement, hypoattenuating lesion in the portal venous phase (B).