Glomus tumor of a female breast: a case report and review of the literature.

Glomus tumor is a benign, subcutaneous neoplasm which usually arises in areas that are rich in glomus bodies, most commonly the digital area, and usually appears as a painful nodule. Glomus tumor of the breast is extremely rare, and there has been only limited information reported in the literature to date. We herein present a case of a glomus tumor arising from the breast, showing a well-circumscribed, hypervascular, solid and hypoechoic tumor within the retromammary fat. The tumor was resected and the patient's pain was relieved immediately after the surgery. She remains well without any symptoms after a year. This report describes a unique case of this type of tumor.