Review Question - QID 109523

A 67-year-old man presents to his primary care physician for abdominal pain. The patient states that he has had abdominal pain for the past month that has been steadily worsening. In addition, he endorses weight loss and general fatigue. The patient has a past medical history of obesity, diabetes, and hypertension. His current medications include metformin, insulin, and lisinopril. The patient is a current smoker and drinks roughly 3 drinks per day. His temperature is 99.5°F (37.5°C), blood pressure is 139/79 mmHg, pulse is 95/min, respirations are 17/min, and oxygen saturation is 98% on room air. The patient's cardiac and pulmonary exams are within normal limits. Examination of the patient's lower extremity reveals multiple tender palpable masses bilaterally that track linearly along the patient's lower extremity. Which of the following is the most appropriate next step in management?