Duct ectasia of bilateral accessory breast associated with pituitary microadenoma: a case report and literature review

Abstract Background Mammary duct ectasia is an acute or chronic inflammatory breast disease that occurs mainly in nonlactating women. It rarely occurs in the accessory breast. The etiology of this condition remains unclear. The long course and complex clinical manifestations of this disease in some patients make it easy to misdiagnose. Case Presentation Herein, we report a case of bilateral accessory breast duct ectasia. A 34-year-old nonlactating Chinese woman presented with a mass in the right axilla. Physical examination and ultrasonography revealed inflammatory lesions in both accessory breasts. Laboratory data and magnetic resonance imaging revealed hyperprolactinemia and pituitary microadenoma. Penicillin and bromocriptine were administered to prevent infection and reduce serum prolactin levels. We performed a simple mastectomy of the bilateral accessory breasts. The outcome was satisfactory. Conclusion This article reports the first case of bilateral accessory breast associated with pituitary microadenoma and reviews the literature to provide a reference for clinicians.