Eosinophilic esophagitis: endoscopic findings.

Eosinophilic esophagitis is a condition characterized by a dense infiltration of eosinophils within the epithelium that may extend into the deeper layers of the esophagus associated with distinctive endoscopic changes. The changes are frequently found in patients who have hypersensitivity to various foods and aeroallergens but overlap exists with gastroesophageal reflux disease. It is essential for all endoscopists to become familiar with the endoscopic findings of eosinophilic esophagitis to avoid delays or errors in diagnosis and to optimally assess outcomes of treatment.