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Characterization of hepatic adenoma and focal nodular hyperplasia with gadoxetic acid
Author(s) -
Mohajer Kiyarash,
Frydrychowicz Alex,
Robbins Jessica B.,
Loeffler Agnes G.,
Reed Thomas D.,
Reeder Scott B.
Publication year - 2012
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.23701
Subject(s) - gadoxetic acid , focal nodular hyperplasia , medicine , magnetic resonance imaging , adenoma , radiology , hepatocellular adenoma , gadolinium dtpa , pathology , hepatocellular carcinoma
Abstract Purpose: To characterize imaging features of histologically proven hepatic adenoma (HA) as well as histologically and/or radiologically proven focal nodular hyperplasia (FNH) using delayed hepatobiliary MR imaging with 0.05 mmol/kg gadoxetic acid. Materials and Methods: Five patients with six HAs with histological correlation were retrospectively identified on liver MRI studies performed with gadoxetic acid, and T1‐weighted imaging acquired during the delayed hepatobiliary phase. Additionally, 23 patients with 34 radiologically diagnosed FNH lesions (interpreted without consideration of delayed imaging) were identified, two of which also had histological confirmation. Signal intensity ratios relative to adjacent liver were measured on selected imaging sequences. Results: All six hepatic adenomas (100%), which had histological confirmation, demonstrated hypointensity relative to adjacent liver on delayed imaging. Furthermore, all of the FNH (including 34 radiologically proven, 2 of which were also histologically proven) were either hyperintense (23/34, 68%) or isointense (11/34, 32%) relative to the adjacent liver on delayed imaging. None of the FNHs were hypointense relative to liver. Conclusion: Distinct imaging characteristics of HA versus FNH on delayed gadoxetic acid‐enhanced MRI, with adenomas being hypointense and FNH being iso‐ or hyperintense on delayed imaging may improve specificity for characterization, and aid in the differentiation of these two lesions. J. Magn. Reson. Imaging 2012;36:686–696. © 2012 Wiley Periodicals, Inc.