Eosinophilic esophagitis (EoE) is a recently recognised pathologic entity whose prevalence has risen significantly since first being described in 1993. Defined as a chronic, local immune-mediated disease with predominant eosinophil infiltration, it is nowadays the leading cause of dysphagia and food bolus impaction in children and young adults. Genetic and environmental risk factors, and especially food antigens, trigger the disease and are in the focus of investigation as avoidance can cure three quarters of patients. The most common antigen involved is milk, followed by egg and gluten. These patients frequently come undiagnosed to the otolaryngologist with complaints of dysphagia and recurrent non-sharp food impactions, although pharyngolaryngeal reflux symptoms and other airway complaints could also be a first sign. Delayed diagnosis and treatment can produce fibrostenosis of the esophagus that greatly impairs patients' quality of life.In-office transnasal esophagoscopy with esophageal biopsy offers a unique opportunity to promptly diagnose and follow-up these patients, without causing the morbidity of repeated sedations and reducing exploration overload in gastroenterology departments. The search for food-antigen triggers, response evaluation to swallowed steroids, or proton pump inhibitors (PPIs) make multiple endoscopies and biopsies necessary every 6 to 8 weeks.There are three first-line interchangeable treatments with the same recommendation: PPIs, dietary allergen elimination and topical swallowed steroids. The choice should be discussed with the patient on an individual basis.The objective of this article is to raise awareness of this condition, update otolaryngologists with the new EoE consensus, and highlight the need for biopsy in patients with dysphagia to rule out EoE.
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