Pleomorphic Adenoma of the Accessory Axillary Breast: A Rare Case Report

ABSTRACT

Pleomorphic adenoma (PA) is the most common tumor type in the salivary gland. PA is uncommon in the breast tissue. Only 73 cases of PA of the breast have been reported in the world literature. But no case in the accessory axillary breast has been reported so far. It is most commonly seen in postmenopausal women and is characterized by an admixture of epithelial and myoepithelial cells embedded in abundant myxomatous stroma. Its clinical and histologic appearance can be challenging and may lead to a misdiagnosis of invasive carcinoma. We report a case of pleomorphic adenoma (benign mixed tumor) of the accessory axillary breast, which is an extremely rare location for this tumor.