Hepatic adenoma: MR findings in 51 pathologically proved lesions.
OBJECTIVE
To describe the magnetic resonance (MR) imaging features of hepatic adenoma and correlate these findings with histopathologic findings.


METHODS
MR findings of 51 pathologically proved hepatic adenomas in 29 consecutive patients were retrospectively analyzed. T1- and T2-weighted spin-echo (SE) images were obtained in all patients, and contrast material-enhanced MR images were obtained in 16 patients.


RESULTS
At pathologic analysis, a peripheral rim, observed in 16 (31%) hepatic adenomas, corresponded to pseudocapsule, and tumor heterogeneity, observed in 26 (51%) lesions, corresponded to hemorrhagic necrosis and peliosis. Hyperintensity on T1-weighted SE images was observed in 30 (59%) adenomas; 10 (67%) of 15 hepatic adenomas were hyperintense on contrast-enhanced gradient-echo images, and 13 (45%) of 29 were hyperintense on delayed contrast-enhanced T1-weighted SE images.


CONCLUSIONS
Presence of a peripheral rim, heterogeneity, and hyperintensity are common features of hepatic adenoma.
Department of Radiology, Hôpital Saint-Antoine, Paris, France.
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L
Arrivé
J F
JF
Fléjou
V
V
Vilgrain
J
J
Belghiti
D
D
Najmark
M
M
Zins
Y
Y
Menu
J M
JM
Tubiana
H
H
Nahum
D000236:Adenoma / Q000175:diagnosis* / Q000473:pathology; D000328:Adult; D005260:Female; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies