USMLE® Step 1 style questions USMLE
An 80-year-old man comes to the clinic due for a follow-up after hospitalization. He was hospitalized two weeks ago for pneumonia and was treated with ampicillin-sulbactam. Medical history is notable for type 2 diabetes mellitus and aortic stenosis. Further medical history reveals 2 prior hospitalizations in the past year for pneumonia. The patient reports difficulty swallowing and regurgitation of undigested food particles. A barium esophagram is performed and shown below:
Retrieved from: Wikimedia Commons
Which of the following areas is most likely responsible for this patient’s condition?