"Alcoholic hepatitis" in a hepatic adenoma.

A unique hepatic adenoma developed in a 26-year-old woman who had used oral contraceptives for 10 years and Tolinase (tolazamide sulfonylurea) for adult-onset diabetes mellitus for five years. Clinically, radiographically, and grossly, the neoplasm showed the usual features of a hepatic adenoma, but microscopically it strongly resembled alcoholic hepatitis with steatonecrosis and Mallory bodies. The surrounding hepatic parenchyma was entirely normal. On transmission electron microscopy these Mallory bodies appeared to be tangles of intermediate filaments. They stained readily with antibodies to cytokeratin but not with antibodies to epidermal keratin or vimentin, just as in "alcoholic" hyalin.