CT and MRI characteristics of hepatic epithelial angiomyolipoma / 实用放射学杂志

ABSTRACT

Objective To explore the CT and MRI characteristics of hepatic epithelioid angiomyolipomas (H EA)in order to improve recognition and diagnostic accuracy of the disease.Methods The CT and MR imaging data of 8 patients with HEA proved by pathology were analyzed retrospectively.Among these patients,4 cases underwent plain and enhanced CT scans,2 plain and enhanced MRI scans and 2 both CT and MRI scans.Results In the 8 cases,7 were female.All lesions were solitary and well-defined,with maximum diameters ranging from 42 mm to 68 mm.6 leions on plain CT displayed slightly low density,of which 1 showed fat density and other 2 showed patchy cystic areas.MRI showed 4 masses with slight hypointensity on T1 WI,slight hyperintensity or hyperintensity on T2 WI,of which one demonstrated decreased signal on out-phase of T1 WI.On enhanced MR images,7 masses were significantly inhomogeneous in arterial phase,5 showed "fast wash-in and slow wash-out",2 "fast wash-in and wash-out"and 1 "slow wash-in and wash-out".6 showed"central vascular sign"in arterial phase and 2 displayed incomplete pseudocapsule in the portal venous and delayed phases.Conclusion Inhomogeneous enhancement in arterial phase,central vascular sign,fast wash-in and slow wash-out enhancement and no pseudocapsule are imaging features of HEA,which can help to improve the diagnostic accuracy.Its diagnosis still depends on histopathology and immunohistochemistry.