Hepatocellular adenoma MRI: Difference between revisions
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*After injection of a hepatocellular-specific contrast agent such as gadolinium benzyloxypropionictetraacetate (Gd-BOPTA) there is usually no substantial uptake. | *After injection of a hepatocellular-specific contrast agent such as gadolinium benzyloxypropionictetraacetate (Gd-BOPTA) there is usually no substantial uptake. | ||
<Gallery> | <Gallery> | ||
Axial_T1_out_of_phase_hepatic_adenoma.jpg | Axial_T1_out_of_phase_hepatic_adenoma.jpg|Selected images from liver MRI show a large, subtle T2 hyperintense, well defined rounded lesion in the liver which demonstrates homogenous signal loss on T1 opposed phase scans. Post contrast images, there is prompt arterial enhancement and lesional washout. Incidental lesion lateral to the main one is seen, best appreciated on the arterial phase. | ||
Hepatic-adenoma-T2_fat_sat.jpg | Hepatic-adenoma-T2_fat_sat.jpg | ||
Revision as of 15:59, 16 October 2015
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Hepatocellular adenoma Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Hepatocellular adenoma MRI On the Web |
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American Roentgen Ray Society Images of Hepatocellular adenoma MRI |
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Risk calculators and risk factors for Hepatocellular adenoma MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]
Overview
MRI
- On T1-weighted MR images, hepatocellular adenomas have been variously described as hyperintense, isointense, and hypointense lesions.
- It has been reported that 47%–74% of hepatocellular adenomas are predominantly hyperintense relative to liver on T2-weighted images; this is due to prolonged T2 and is consistent with findings in other hepatic tumors.
- Some lesions are hypointense and isointense on T2-weighted images.
- Most lesions are heterogeneous, demonstrating a combination of hyper- and hypointensity on T2-weighted images relative to hemorrhage and necrosis.
- Dynamic gadolinium-enhanced gradient-echo MR imaging, like dynamic CT, can be used to demonstrate early arterial enhancement that reflects the presence of subcapsular feeding vessels.
- Adenomas usually do not show uptake of superparamagnetic iron oxide particles, resulting in decreased signal intensity on T2-weighted images.
- After injection of a hepatocellular-specific contrast agent such as gadolinium benzyloxypropionictetraacetate (Gd-BOPTA) there is usually no substantial uptake.
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Selected images from liver MRI show a large, subtle T2 hyperintense, well defined rounded lesion in the liver which demonstrates homogenous signal loss on T1 opposed phase scans. Post contrast images, there is prompt arterial enhancement and lesional washout. Incidental lesion lateral to the main one is seen, best appreciated on the arterial phase. -
