Which imaging findings are characteristic of pseudoaneurysm following whole-liver orthotopic liver transplantation (OLTX)?

Updated: Mar 01, 2019
  • Author: Paul D Russ, MD; Chief Editor: John Karani, MBBS, FRCR  more...
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Answer

Answer

Hepatic artery pseudoaneurysms can be extrahepatic/paraportal or intrahepatic. Both types appear as spherical, hypoechoic fluid collections on gray-scale US. Pseudoaneurysms can be filled with a variable amount of mural thrombus. Spectral and color Doppler US can be used to document monophasic flow within the patent lumen of a pseudoaneurysm and the typical to-and-fro flow pattern at its neck. On computed tomography (CT) scans, a pseudoaneurysm is depicted as a focal lesion with central enhancement following arterial blood-pool attenuation.


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