Archives of the AFIP -- RadioGraphics

Figure 2: FNH in a 27-year-old woman who presented with persistent abdominal pain. Panel A US scan of the upper abdomen shows a well-defined, homogeneous, slightly hyperechoic mass within the right lobe of the liver. Panel B CT scan obtained after intravenous administration of contrast material during the late portal venous phase reveals a well-defined, homogeneous mass with lower attenuation than that of the adjacent hepatic parenchyma. A central low-attenuation scar (arrow) is also noted. Panel C T1-weighted multiplanar spatial presaturation gradient-refocused (repetition time msec/echo time msec = 107.7/2.4) gradient-echo image shows a large mass within the right lobe of the liver that is nearly isointense relative to the normal liver. The high-signal-intensity linear areas (arrowheads) surrounding the mass are displaced hepatic vessels or part of an enhancing pseudocapsule. The central scar shows low signal intensity (arrow). Panel D Spatial presaturation gradient-refocused (SPGR/20) magnetic resonance (MR) image (20/13.0) obtained during peak portal venous enhancement after the intravenous administration of gadolinium demonstrates enhancement radiating from the central scar in a stellate pattern (arrow). Panel E Delayed (10 minutes after gadolinium injection) T1-weighted image (500/11) demonstrates retention of contrast material within one myxomatous portion of the scar. Panel F Celiac angiogram shows a large hypervascular mass supplied by the right hepatic artery (large arrow). A central stellate area (small arrow), from which the blood vessels supplying the lesion arise, is noted; it branches in a spoked-wheel pattern, similar to that noted in d. Panel G Gross section of the right lobectomy specimen shows a well-circumscribed mass with a central scar (arrow) radiating peripherally.

Return to: Radiologic Features