Adenomyoepithelioma of the breast: two cases

Adenomyoepithelioma of the breast are very rare and form a heterogeneous tumoral group in terms of their morphology and biological behaviour. We report two adenomyoepitheliomas of the breast. One appeared in a 29-year-old woman and was a tubular adenomyoepithelioma. The patient was free of disease at a 22 months follow-up. The other was a lobular adenomyoepithelioma that appeared in a 76-year-old woman and was characterized by its high mitotic rate and its association with myoepitheliosis. Adenomyoepitheliomas of the breast are currently classified as low grade malignant tumors that may recur and rarely metastasize, but their histoprognostic factors are not yet defined.