Pleomorphic adenoma of the human breast

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Abstract
Pleomorphic adenomas of the human breast are histologically identical to those of salivary glands. To date, the literature reports but 15 such benign tumors, all of which occurred in women. The present paper describes clinical and pathologic findings in three further cases, including one man. Considered together, unnecessary mastectomy occurred in 44.4%, indicating the importance of separating this benign entity from malignancies with stromal metaplasia. In case of examination by frozen section, a peripheral portion, if not the entire tumor, should be submitted to the pathologist.