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“Pseudo Washout” Sign in High-Flow Hepatic Hemangioma on Gadoxetic Acid Contrast-Enhanced MRI Mimicking Hypervascular Tumor

2009; American Roentgen Ray Society; Volume: 193; Issue: 6 Linguagem: Inglês

10.2214/ajr.08.1732

1546-3141

Kyung Won Doo, Chang Hee Lee, Jae Woong Choi, Jongmee Lee, Kyeong Ah Kim, Cheol Min Park,

Medical Imaging and Pathology Studies

The purpose of this article is to describe the "pseudo washout" sign of high-flow hepatic hemangioma that mimics hypervascular tumor on gadoxetic acid-enhanced MRI.High-flow hemangiomas might show relatively low signal intensity because of gadoxetic acid contrast uptake in the surrounding normal liver parenchyma during the equilibrium (3-minute delay) phase. Such findings are called pseudo washout and can mimic hypervascular hepatic tumors. However, high-flow hemangioma can be diagnosed by observing bright signal intensity on T2-weighted imaging, arterial phase-dominant enhancement, pseudo washout sign during the equilibrium phase, and isointense or slightly increased signal intensity on subtraction images.