Review Question - QID 212729

A 49-year-old woman presents to her primary care physician complaining of persistent nipple discharge. She reports that for 2 months she has had yellowish brown discharge from her right nipple. She recalls getting hit in the chest during a charity basketball game around the same time she first noticed the discharge. She endorses a recent viral upper respiratory infection that has since resolved and denies any other symptoms. Her last period was 2 weeks ago. Her periods occur regularly, about every 28 days. She has 2 healthy sons, aged 19 and 23. Her paternal grandmother died of breast cancer that was HER2-neu positive. On physical exam, a 2-cm, firm, immobile nodule is appreciated in the lateral-upper quadrant of the right breast as well as enlarged, non-tender, right-sided axillary lymph nodes. A mammography of the right breast is obtained, as shown in Figure A. Which of the following is the next step in management?