title: Hepatic focal nodular hyperplasia: MR imaging at 1.0 and 1.5 T.
abstract: Ten cases of hepatic focal nodular hyperplasia (FNH) were studied with magnetic resonance (MR) imaging. Proof of diagnosis was by needle biopsy or follow-up of as long as 5 years. Both short TR/TE and long TR/TE images were obtained. The most common finding was isointensity of the lesion relative to liver parenchyma with all pulse sequences. A central scar was seen in only one patient and was hyperintense on long TR/TE images. Slight hyperintensity of the lesion on short TR/TE and long TR/TE images was seen in two cases. Textural heterogeneity was present in only one of these. The most common presentation in our series was a visually isointense lesion relative to liver on short TR/TE images and an isointense or slightly hyperintense lesion on long TR/TE images. A review of the literature and the present findings suggest that FNH has a variable appearance on MR images.
authors.affiliation: Department of Diagnostic Radiology and Medical Imaging, Henry Ford Hospital, Detroit, MI 48202.
authors.forename: A M
authors.initials: AM
authors.lastname: Haggar
authors.forename: R L
authors.initials: RL
authors.lastname: Bree
mesh_terms: D006801:Humans; D006965:Hyperplasia; D008099:Liver / Q000473:pathology; D008107:Liver Diseases / Q000175:diagnosis*; D008113:Liver Neoplasms / Q000175:diagnosis; D008279:Magnetic Resonance Imaging