Eosinophilic esophagitis (EoE) is a chronic inflammatory condition characterized by esophageal dysfunction and eosinophilic infiltrate in the esophageal epithelium in the absence of other potential causes of eosinophilia. EoE is increasing in incidence and prevalence, and is a major cause of gastrointestinal morbidity among children and adults. EoE is thought to be immune mediated, with food or environmental antigens stimulating a T-helper (Th)-2 inflammatory response. An increased understanding of the pathogenesis of EoE has led to the evolution of diagnostic and treatment paradigms. We review the latest approach to diagnosis of EoE and present consensus diagnostic guidelines. We also discuss the clinical, endoscopic, and histologic features of EoE and challenges to diagnosis. Finally, we present the 3 major treatment options for EoE: pharmacologic therapy, dietary modification, and endoscopic dilation
