Computed Tomography and Magnetic Resonance Imaging Findings of Inflammatory Pseudotumors in the Abdomen and Pelvis: Current Concepts and Pictorial Review

Inflammatory Pseudotumor of the Liver Presented in a Patient with Cholelithiasis

An inflammatory pseudotumor of the liver is a rare tumor-like lesion consisting of an inflammatory infiltrate that often can mimic a malignant liver neoplasm. The cause of an inflammatory pseudotumor of the liver is unknown, but it has been reported to be associated with different comorbid conditions most likely inflammatory or infectious in origin. We present an 83-year-old female who presented with a symptomatic gallstones disease and an incidental finding of inflammatory pseudotumor mimicking intrahepatic cholangiocarcinoma in preoperative liver imaging. Differentiating a pseudotumor from hepatic space-occupying neoplasms is crucial since it is one of the most important tumor-mimicking lesions. The imaging findings of this rare tumor can pose diagnostic difficulties because of the amount of fibrosis and cellular infiltration. If malignancy has been excluded, patients can be treated conservatively with steroids and non-steroidal anti-inflammatory drugs. However, complete surgical resection has been the modality of treatment for most of the cases with an indeterminate diagnosis.