Review Question - QID 109341

A 34-year-old female with a history of recurrent kidney stones presents to her nephrologist for a follow-up visit. She reports intermittent hematuria and has passed multiple kidney stones since her last visit six months ago. She has made multiple alterations to her diet, including increasing her water intake and reducing her consumption of animal proteins and sources of phosphoric acid and oxalic acid. She takes hydrochlorothiazide and supplemental citrate. Her past medical history is also notable for generalized anxiety disorder. Her temperature is 99.4°F (37.4°C), blood pressure is 115/80 mmHg, pulse is 75/min, and respirations are 16/min. To identify structural causes of the patient’s recurrent kidney stones, the nephrologist orders a CT of the patient’s abdomen, which is shown in Figure A. Which of the following vessels is most likely blocking the normal development of this patient’s genitourinary tract?