Pseudolesions are focal areas of abnormal, mass-like enhancement commonly seen on CT and MR without underlying parenchymal changes
Appear due to unusual hemodynamics, vascular compromise, and arterioportal shunting
Vascular pseusolesions commonly develop in patients with cirrhosis and may or may not be associated with tumors, such as hepatocellular carcinoma (HCC)
Hyperenhancing pseudolesions mimic HCCs in cirrhotic liver, especially if round or oval
Pseudotumors are focal, mass-like, nonneoplastic parenchymal changes, such as focal fatty deposition, focal fatty sparing, and IPT
IMAGING
US Findings
CEUS Findings
Selected References
Elsayes KM et al: Spectrum of pitfalls, pseudolesions, and misdiagnoses in noncirrhotic liver. AJR Am J Roentgenol. 211(1):97-108, 2018
Kong WT et al: The analysis of enhancement pattern of hepatic inflammatory pseudotumor on contrast-enhanced ultrasound. Abdom Imaging. 39(1):168-74, 2014
Kobayashi S et al: Radiologic manifestation of hepatic pseudolesions and pseudotumors in the third infow area. Imaging Med. 2(5): 519–528, 2010
Hirche TO et al: Evaluation of hepatic steatosis by ultrasound in patients with chronic hepatitis C virus infection. Liver Int. 27(6):748-757, 2007
Catalano O et al: Transient hepatic echogenicity difference on contrast-enhanced ultrasonography: sonographic sign and pitfall. J Ultrasound Med. 26(3):337-45, 2007
Schneider G et al: Hepatic pseudolesions. In Schneider G et al: Hepatic pseudolesions. MRI of the Liver: Imaging Techniques, Contrast Enhancement, Differential Diagnosis. Milan: Springer-Vertag. 151-186, 2006
Related Anatomy
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References
Tables
Tables
KEY FACTS
Terminology
US Findings
CEUS Findings
TERMINOLOGY
Abbreviations
Inflammatory pseudotumor (IPT)
Arterioportal shunt (APS)
Definitions
Pseudolesions are focal areas of abnormal, mass-like enhancement commonly seen on CT and MR without underlying parenchymal changes
Appear due to unusual hemodynamics, vascular compromise, and arterioportal shunting
Vascular pseusolesions commonly develop in patients with cirrhosis and may or may not be associated with tumors, such as hepatocellular carcinoma (HCC)
Hyperenhancing pseudolesions mimic HCCs in cirrhotic liver, especially if round or oval
Pseudotumors are focal, mass-like, nonneoplastic parenchymal changes, such as focal fatty deposition, focal fatty sparing, and IPT
IMAGING
US Findings
CEUS Findings
Selected References
Elsayes KM et al: Spectrum of pitfalls, pseudolesions, and misdiagnoses in noncirrhotic liver. AJR Am J Roentgenol. 211(1):97-108, 2018
Kong WT et al: The analysis of enhancement pattern of hepatic inflammatory pseudotumor on contrast-enhanced ultrasound. Abdom Imaging. 39(1):168-74, 2014
Kobayashi S et al: Radiologic manifestation of hepatic pseudolesions and pseudotumors in the third infow area. Imaging Med. 2(5): 519–528, 2010
Hirche TO et al: Evaluation of hepatic steatosis by ultrasound in patients with chronic hepatitis C virus infection. Liver Int. 27(6):748-757, 2007
Catalano O et al: Transient hepatic echogenicity difference on contrast-enhanced ultrasonography: sonographic sign and pitfall. J Ultrasound Med. 26(3):337-45, 2007
Schneider G et al: Hepatic pseudolesions. In Schneider G et al: Hepatic pseudolesions. MRI of the Liver: Imaging Techniques, Contrast Enhancement, Differential Diagnosis. Milan: Springer-Vertag. 151-186, 2006
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