Which findings on ultrasonography are characteristic of hepatocellular adenoma (HCA)?

Updated: Feb 21, 2018
  • Author: Bradford A Whitmer, DO; Chief Editor: BS Anand, MD  more...
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Answer

A nonspecific finding reveals a hypoechoic lesion, which usually is subcapsular (7% pedunculated), well circumscribed, ranges from 2 to 20 cm in size, and is located predominantly in the right lobe of the liver.

Doppler flow patterns in hepatocellular adenomas are venous, as compared to the arterial pattern noted in FNH.

Contrast-enhanced ultrasonography (CEUS)

CEUS involves using a microbubble contrast that reveals an enhancement in the arterial phase of HCA and focal nodular hyperplasia, but rapidly washes out in the portal venous and delayed phase in HCA. [35, 36, 37, 38]

The reported sensitivity in differentiating HCA from focal nodular hyperplasia has ranged from 86% to 95%, and the specificity has ranged from 74% to 79%. [39]


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