Hepatocellular adenoma CT: Difference between revisions
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(Created page with "{{Hepatocellular adenoma}} {{CMG}} ==Overview== ==References== {{reflist|2}} Category:Disease Category:Types of cancer Category:Oncology [[Category:Gastroenter...") |
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{{Hepatocellular adenoma}} | {{Hepatocellular adenoma}} | ||
{{CMG}} | {{CMG}}; {{AOEIC}} {{CZ}} | ||
==Overview== | ==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. | |||
==References== | ==References== | ||
Revision as of 19:25, 21 January 2012
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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 CT On the Web |
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American Roentgen Ray Society Images of Hepatocellular adenoma CT |
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Risk calculators and risk factors for Hepatocellular adenoma CT |
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.