A case of an FNH-like hyperplastic nodule presenting ring enhancement in a peritumoral spared area on single level dynamic CT during hepatic arteriography

Abstract

A 21-year-old man was referred to our department for further examinations of multiple hepatic nodules that showed low attenuation on US and high attenuation on noncontrasted CT. Dynamic CT and MRI showed arterial enhancement of the nodules and Levovist® enhanced US and SPIO MRI images disclosed the presence of Kupffer cells in the nodules. Histological examination identified the nodules as FNH-like hyperplastic. Single level dynamic CTHA imaging showed ring-like enhancement within a nodule-like high density area, which may have been formed as a spared lesion by venous drainage from the tumor in the surrounding fatty parenchyma. We wish to emphasize that ring-like enhancement, thought to be specific for hepatocellular carcinoma, may also be observed in hyperplastic nodules. © 2006 The Japan Society of Hepatology.