Abstract
A 48-year-old woman who developed fibroadenoma in accessory mammary breast tissue in the right axilla is reported.
The extramammary gland consists of accessory and aberrant mammary glands, depending upon the presence or absence of 1) nipples, 2) areolae and 3) common ducts. Toumor formation in the extramammary breast tissue has rarely been reported. Of the 44 cases reported in the literature during the last 50 years, 34 were malignant, seven mastopathies and three fibroadenomas including our case. In the majority of cases. They occurred in the axilla and originated from the accessory mammary breast tissue.
The case described here was suspected to involve malignant changes on admission, but the histology revealed fibroadenoma in the accessory mammary breast tissue.
When confronted with a patient possessing a large axillary mass without a nipple or an areola, it is important to consider not only the various subucutaneous axillary tumors, but also the possibility of malingnant changes in the extramammary breast tissue.
