Abstract
Acute esophageal mucosal lesions (AEMLs) are categorized into black esophagitis (type B) and non-black esophagitis (type NB) on endoscopy. To clarify the distinct pathophysiology, we compared the clinical features and hematological findings at onset among 17 patients with type B esophagitis and 6 patients with type NB esophagitis. In type B esophagitis, time to endoscopy after onset was significantly shorter, and blood levels of lactate, urea nitrogen, creatinine, and glucose were higher than in type NB esophagitis. However, there were no significant intergroup differences in the incidences of other predisposing factors, such as diabetic ketoacidosis or esophageal hernias. These findings suggest that AEMLs are caused by acid reflux and peripheral vascular insufficiency, the latter being more associated with type B esophagitis by its etiology. In addition, blood lactate may indicate the severity of AEML, leading to black esophagitis.
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