Epithelioid angiomyolipoma of the liver with striking giant cell component: fine-needle aspiration biopsy findings of a rare neoplasm.

Angiomyolipoma (AML) is a uncommon benign neoplasm of the liver with cyto- and histologic features similar to the more commonly encountered renal AML. Tumors composed predominantly of epithelioid cells have been referred to as epithelioid AML. Because most liver lesions are first evaluated by fine-needle aspiration biopsy (FNAB), it is important to distinguish this variant of AML from more common hepatic neoplasms such as hepatocellular carcinoma (HCC) or metastatic tumors. Rare reports of epithelioid AML of the liver diagnosed by FNAB are in the literature. Here, we describe the cytologic findings of a unique case of epithelioid AML with numerous giant cells.