Abstract
Adenoid cystic carcinoma（ACC）is a rare type of breast cancer that represents about 0.1% of all breast cancers, and considered as a good prognostic disease with rare instances of local recurrence or distant metastasis. We report a rare case of adenoid cystic carcinoma of the breast with the widely growth and the invasion to the skin.A 58-year-old woman visited our hospital because of a palpable tumor about 7cm in diameter with tenderness and skin redness in the C area of the left breast. A mammogram showed a lobulated mass with unclear border and resulted in category 4. An ultrasonogram showed a low-echoic tumor with partially unclear border and heterogeneous inner part. With core-needle biopsy, we suspected the histologic type of this tumor was ACC. Modified mastectomy with levelⅠaxillary lymph node dissection was performed. There was no lymph node metastasis or distant metastasis. Estrogen and progesterone receptors were negative, and no HER-2 expression in this tumor. She has been free from recurrence for 7 years after the operation. Thus we consider that once a complete excision of the local lesion is carried out, the prognosis is good, regardless of the progression or the invasion.
