Mammary Myofibroblastoma in a Male Patient

A mammary myofibroblastoma is a rare benign lesion found within the breast tissue of both males and females. Although it is a benign mass, it may mimic breast carcinoma on mammography and sonographic imaging. This is a case report of a 68-year-old male with a history of prostate cancer presenting with a tender and palpable mass of the left breast in the 11 o’clock position. Ultrasound-guided core biopsy was performed and pathology confirmed the diagnosis of myofibroblastoma of the breast. Mammary myofibroblastoma should be considered in a patient presenting with a breast mass, particularly older men and postmenopausal women. A core biopsy should be obtained to rule out a more serious diagnosis.