INFLAMMATORY PSEUDOTUMOR OF THE LIVER - RADIOLOGIC-PATHOLOGICAL CORRELATION

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.