Carcinoma of the breast in men.

Male breast cancer is an uncommon disease of uncertain etiology. We describe a 66-year-old man who presented with a palpable mass in the left breast with associated nipple inversion. Mammographic images demonstrated a spiculated mass within the subareolar left breast at the palpable area of concern. Sonographic evaluation demonstrated a hypoechoic mass within the subareolar left breast at the location of the mammographic abnormality. The patient underwent an excisional biopsy and was subsequently diagnosed with high-grade invasive ductal carcinoma, the most common histologic type of carcinoma identified in men.