Fig. 20
From: Non-neoplastic hepatopancreatobiliary lesions simulating malignancy: can we differentiate?
A 28-year-old male with no significant medical history presented with right upper quadrant pain and weight loss. a T2W axial plane MR image demonstrates a solid mass (arrows) within the right liver lobe. b Postcontrast axial plane T1W image in the portal venous phase demonstrates heterogenous enhancement of the lesion (arrows). Surgical resection, with a putative diagnosis of cholangiocellular carcinoma, of this mass revealed inflammatory pseudotumor with features suggestive of IgG4-related sclerosing cholangitis. Post-surgical evaluation revealed elevated serum IgG4 levels