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Technique: Helical CT of the liver was performed in multiple phases, this include noncontrast and following intravenous injection of nonionic contrast, arterial and portal vein. Multiplanar reformations were performed.

Findings: Diffuse fatty infiltration of the liver is demonstrated. Well-circumscribed hyperdense lesion is noted within the right liver lobe on noncontrast imaging with hyperattenuation in the early arterial and portal venous phase. Areas of hyperdense parenchyma when compared to fatty liver background are noted around the gallbladder and within caudate lobe. The gallbladder, biliary system, pancreas, spleen, adrenals and kidneys demonstrate normal morphology and enhancement without mass lesions. There is no evidence of free fluid or free air in the peritoneal cavity. The hollow viscera are without evidence of wall thickening, mass or obstruction.
There is no lymphadenopathy. The bladder is normal. Ovoid fluid collection within the right adnexa most likely represent ovarian cyst. The remainder of the soft tissues and osseous structures are unremarkable.

1. Well-circumscribed lesion in the right liver lobe may represent focal parenchymal sparing versus focal nodular hyperplasia. For further clarification recommend MRI with Eovist.
2. Hepatic steatosis with focal parenchymal sparing in the caudate lobe and the gallbladder fossa.