Hepatocellular adenoma CT
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Hepatocellular adenoma Microchapters |
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American Roentgen Ray Society Images of Hepatocellular adenoma CT |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]
Overview
Computed Tomography
- Fat or hemorrhage can easily be identified on unenhanced images, and delayed-phase images demonstrate the tendency for fibrotic components to enhance and retain contrast material.
- Because adenomas consist almost entirely of uniform hepatocytes and a variable number of Kupffer cells, most adenomas are nearly isoattenuating relative to normal liver on unenhanced, portal venous–phase, and delayed-phase images.
- In patients with fatty liver, adenomas are hyperattenuating at all phases of contrast enhancement and on unenhanced images as well.
- Small hepatocellular adenomas enhance rapidly and are hyperattenuating relative to the liver.
- Excluding lesions with acute or old tumor hemorrhage and fat deposition, hepatocellular adenoma demonstrated homogeneous or nearly homogeneous enhancement in approx 80% of cases.
- The enhancement usually does not persist in adenomas because of arteriovenous shunting.
- Larger hepatocellular adenomas may be more heterogeneous than smaller lesions, and their CT appearance is less specific.