Imaging features and management of focal liver lesions

Figure 8 World Health Organization CE2 and CE3a type hydatid cysts. A 35-year-old man with nonspecific right upper quadrant pain. A: Axial T2 weighted magnetic resonance imaging (MRI) shows a T2 hyperintense hydatid cyst [World Health Organization (WHO) type CE2] with a solitary main cyst (arrow) and small daughter cysts (arrowhead) posteriorly; B: Axial T1 weighted MRI shows a T1 hypointense hydatid cyst with a solitary main cyst (arrow); C: Axial T1 weighted MRI with an extracellular gadolinium-based contrast agent in the portal venous phase shows a hydatid cyst that demonstrates no enhancement; D: Axial contrast-enhanced computed tomography (CT) image shows a hydatid cyst with the main cyst (arrow) and daughter cysts (arrowheads); E: Axial contrast-enhanced CT image of the same patient after one year shows a hydatid cyst (arrow) (WHO type CE3a) with detached membranes (arrowhead) floating within the main cyst.