Review Question - QID 214685

A 68-year-old man presents to the emergency department with discolored urine. He first noticed occasional red-tinted urine 3 months ago, but this week it has happened more frequently. He was in a motor vehicle accident 4 months ago. He denies abdominal pain, back pain, leg swelling, and difficulty voiding. He has a history of chronic obstructive pulmonary disease and benign prostastic hyperplasia. His medications include tamsulosin and a multivitamin. He has smoked 1 pack per day for 35 years and drinks 1-2 beers daily. His temperature is 97.4°F (36.3°C), blood pressure is 140/80 mmHg, pulse is 72/min, and respirations are 17/min. On exam, his heart rate and rhythm are regular and he has end expiratory wheezes bilaterally. Urinalysis reveals red blood cells with no casts. Abdominal CT is shown in Figure A. Which of the following is the most appropriate next step in management?