Hepatic Epithelioid Angiomyolipoma Treated with Laparoscopic Resection: Case Report and Review of the Literature

Figure 3

Histopathologic features of epithelioid angiomyolipoma. (a) Well-circumscribed mass with adjacent, mildly steatotic liver parenchyma (H&E; 20x). (b) The tumor is composed of eosinophilic cells, mature adipocytes, and thick walled vessels (center) (H&E; 100x). (c) The smooth muscle component includes a mixture of large epithelioid cells with abundant eosinophilic cytoplasm and prominent nucleoli, with interspersed smaller epithelioid cells and spindle cells (H&E; 400x). Immunohistochemistry performed on the biopsy of this lesion for HMB45 (200x) (d) and Smooth Muscle Actin (200x) (e) showed patchy, strong positivity in the lesional cells.

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