Breast cancer is the most common cancer among women in the United States. But it is not only limited to women, and because men face questionable breast masses too, the importance of ultrasound keeps growing. A painless breast lump is always a concern to anyone—man or woman. As breast lumps in men become more common, breast ultrasound assumes an increasingly important function in differentiating benign from malignant lumps and guiding large-core needle biopsies.
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