Review Question - QID 215097

A 26-year-old woman presents to clinic with 1 month of persistent pain in her left breast. She first noticed a small, firm mass in her left breast approximately 2 months ago. Since then, the mass has become tender and has slightly increased in size. She is otherwise healthy with no significant past medical history. She takes no medications. She has no family history of cancer. Her temperature is 36.6°C (97.9°F), blood pressure is 118/79 mmHg, pulse is 72/min, respirations are 13/min, and oxygen saturation is 99% on room air. On exam, there is a 2.5 cm firm, mobile mass in the left breast that is mildly tender to palpation. There is no overlying skin erythema and no lymphadenopathy is noted. Ultrasound of the mass is performed, which is shown in Figure A. Which of the following is the most appropriate next step in treatment?