Hepatic epithelioid hemangioendothelioma: Update on diagnosis and therapy

Figure 1 Magnetic resonance imaging. A: Magnetic resonance imaging shows a target-like sign as a gradual peripheral ring-like enhancement pattern with central low signal intensity in the arterial to delay phases, and the enhanced lesion is surrounded by a thin, hypointense ring on contrasted-enhanced T1-weighted image; B: The lollipop sign consists of a clear tumor mass (candy in the lollipop) and adjacent occluded vein (rod).

Figure 2 Hematoxylin and eosin staining. A: Hematoxylin and eosin staining showing epithelioid and dendritic cells forming primitive vascular structures with a myxoid matrix in epithelioid angioendothelioma (EHE); B: Positive membranous staining for cluster of differentiation (CD31) in epithelioid angioendothelioma, highlighting primitive vascular structures; C: Positive membrane staining for CD34 in EHE, highlighting primitive vascular structures.