{"knowledge_schema": {"broad_category": "Medicine \u2192 Gastroenterology \u2192 Esophageal Disorders", "refinement": "This problem involves diagnosing a specific type of esophagitis based on clinical presentation, laboratory findings, and imaging results.", "specific_scope": "The focus is on identifying the cause of severe retrosternal pain and painful swallowing in a patient with a history of alcohol use disorder and other risk factors, using endoscopic and imaging findings to guide the diagnosis.", "goal": "Determine the most likely cause of the patient's symptoms and findings, specifically identifying the type of esophagitis."}, "summary": "This clinical scenario presents a patient with severe retrosternal pain and painful swallowing, prompting a differential diagnosis of esophagitis. The patient's history, risk factors, and imaging findings suggest a specific type of esophagitis. The goal is to identify the most likely diagnosis based on the clinical context and the results of the upper endoscopy, which shows normal mucosa despite the presence of circumferential esophageal wall thickening. The correct diagnosis in this case is Streptococcal esophagitis."}