RUQ discomfort / fullness and obstructive jaundice.
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A well defined large solitary unilocular cystic mass at the hepatic interlobar region, with enhancing thin smooth wall (fibrous capsule) and hairline internal septations. The content is homogenous and of low density (HU = 0-10).
No calcification. No soft tissue component or papillary projections. No definite signs of invasion.
Mass effect on the surrounding organs / structures is also obvious, with mild intrahepatic biliary dilatation.
Biliary cystadenoma is an uncommon benign tumor of the bile ducts. Being uncommon and pre-malignant, and since radiological differentiation from the more sinister biliary cystadenocarcinoma is unreliable, surgical excision is usually done.
Cystadenomas are usually intrahepatic lesions, and more commonly involve the right lobe.
Histopathology proved biliary cystadenoma.
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