A breast nodule of 15mm is not a big one and is usually easy to treat. If the edge of the nodule is smooth and round or round-like, and the mobility is good and there is no pain when pressed, you can go to the hospital for ultrasound examination. If you exclude malignant tumors, the general growth is relatively slow, you can choose the color ultrasound follow-up observation. You can take a biopsy and send it to the pathologist to confirm the diagnosis, choose the needle aspiration biopsy this kind of examination damage is relatively small, puncture cells if the malignant tumor can be diagnosed, but there is the possibility of missing the diagnosis. You can do breast McMurtry minimally invasive rotary excision surgery, 15mm size nodule can be directly removed completely, the excised tissue can be sent to the pathology examination, this surgical method of skin incision is relatively small after surgery without scarring. In addition, you can also choose the nodule excision surgery, can slightly expand the scope of excision is more thorough.