To the Editor: Eosinophilic esophagitis is an emerging disease worldwide, as documented by recent case series from Switzerland, Australia, Italy, Spain, Japan, England, and the United States.¹,² Eosinophilic esophagitis mimics gastroesophageal reflux disease and may result in narrowing and stricture of the esophagus.¹–³ This disease is differentiated from reflux esophagitis on the basis of the magnitude of mucosal eosinophilia and a lack of response to acid suppression.⁴ We report findings from a population-based demographic study of the pediatric population with eosinophilic esophagitis residing in the vicinity of our medical center (Hamilton County, Ohio), a region with a single . . .