Pleomorphic adenoma in the breast of a human female. Aspiration biopsy findings and receptor determinations. Case report.

A case of multiple pleomorphic adenomas ("mixed" tumour of salivary gland type) of the breast is reported. This rare benign tumour can be misinterpreted as a malignant tumour both clinically and radiologically. The aspiration biopsy findings suggested cystosarcoma phyllodes. Oestrogen and progesterone receptor determinations revealed medium high levels, comparable to carcinoma of the breast.