Eosinophilic esophagitis (e-o-sin-o-FILL-ik uh-sof-uh-JIE-tis), or EoE, is a relatively new diagnosis for a chronic, allergic inflammatory condition of the esophagus. Because the symptoms of EoE can mimic those of gastroesophageal reflux disease (GERD), it can go undiagnosed.

Patients with EoE have a large number of eosinophils (a type of white blood cells) in the tissue of the esophagus. Eosinophils are common in the digestive tract, but an excessive buildup of these cells in the esophagus may be caused by a reaction to foods,

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