Inflammatory pseudotumor of the liver: radiologic-pathologic correlation
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M Abehsera1, V Vilgrain, J Belghiti
1Department of Radiology, Erasme Hospital, University Clinics of Brussels, Belgium.
Objective:
To report the imaging appearance of inflammatory pseudotumor of the liver with pathologic correlation in three cases.
Materials And Methods:
Sonography and CT were performed in all cases. Two lesions were evaluated with MRI. All lesions were resected, and imaging data and histopathology were correlated.
Results:
In all three cases ultrasonography revealed a hypoechoic well-circumscribed mass. In one case CT showed a hypodense homogeneous lesion with central calcifications. No enhancement was demonstrated on postcontrast CT. The lesion appeared hypointense relative to the adjacent liver on T1-weighted MRI and isointense on T2-weighted MRI. A perilesional rim was detected in all cases on postcontract CT and/or MRI. This rim correlated with the histopathologic demonstration of a fibrous capsule in all three cases.
Conclusion:
The following features may be encountered in inflammatory pseudotumor: a homogeneous avascular appearance on CT, isointense signal on T2-weighted MRI, and the presence of a capsule. All these findings correlated well with histopathologic findings.