Liver Sonography by Duplex and Color Doppler



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tarix25.12.2016
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At sonography, portal vein thrombus may appear echogenic, isoechoic, or anechoic, and may be obstructive or non-obstructive (figure 3). At color Doppler, there will be no detectable flow or partial flow if the thrombus is non-occlusive. It is important to always examine the vessels with gray scale before performing color Doppler so as not to miss a subtle non-occlusive thrombus.

When a portal vein thrombus is present, it is important to distinguish benign from malignant thrombosis. The presence of a hepatofugal arterial signal within the thrombus is very specific for a malignant thrombus and is due to tumor vessels growing into the portal vein. However, this finding is not always seen.


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