MEDizzy - A 52-year-old woman has a 2-cm, solid mass within the right

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Liver II

A 52-year-old woman has a 2-cm, solid mass within the right lobe of the liver. A computed tomography (CT) scan reveals a lesion with a central stellate scar. (SELECT 1 DIAGNOSIS)

ExplanationD. Radiographic evidence of a central stellate scar is a characteristic finding of focal nodular hyperplasia. Unfortunately, this finding is not always present and this lesion is often difficult to differentiate from a hepatic adenoma. Unlike a hepatic adenoma, these lesions are not associated with malignant transformation or rupture. Therefore asymptomatic lesions do not require resection. These lesions are composed of hyperplastic Kupffer cells that are easily identified by a sulfur colloid scan.