Q. A 30-year-old man comes to the clinic because of a 6-month history of difficulty swallowing and retrosternal chest pain. He mentions that he had several episodes of difficulty breathing when he was a child, and he used an inhaler to manage these episodes. Other than a history of asthma and seasonal allergies, and a history of several food allergies, he has been healthy. Vital signs are normal. Temperature is 36.7 (98.7 F), Blood Pressure is 120/72, Heart Rate is 72 beats/minute. Cardiopulmonary auscultation is normal except for some wheezes. No masses present on abdominal examination. You suspect the patient has eosiniphilic esophagitis and order an upper endoscopy to confirm the diagnosis. Which of the following findings would confirm your suspicions?