Abstract
Purpose of the study: Allergists, immunologists, and otorhinolaryngologists are actively discussing about inclusion “Eosinophilic otitis media” in the list of human allergic diseases as a separate nosoform, since it differs significantly from other allergic ear lesions in etiology, clinical manifestations, and, above all, treatment tactics.
Materials and methods: A probing analysis of literature data, as well as our own observations regarding the specific signs of eosinophilic otitis media, was conducted, and the main diagnostic, clinical, and laboratory criteria were determined. A clinical case of ESO is provided.
Results: It has been found that eosinophilic otitis media occurs in patients with bronchial asthma and nasal polyposis. IgE-mediated allergy is found in some patients, but is not a universal mechanism. This pathology is considered as an eosinophilic inflammatory disease, and not as a typical secretory otitis media. Treatment is based on the use of local and systemic glucocorticosteroids. An algorithm of diagnostic and therapeutic approaches has been developed and provided for discussion.
Conclusions: Eosinophilic otitis media is a distinct nosological form that is closely related to eosinophilic inflammatory diseases of the respiratory tract. It is considered a Th2 inflammatory disease because middle ear secretions contain numerous eosinophils and high concentrations of type 2 inflammatory biomarkers such as IgE, eosinophilic cationic protein, and IL-5. Further studies should be aimed at clarifying the different phenotypes and endotypes of eosinophilic otitis media and at developing treatment strategies, including the use of biologics medicines.
Keywords: eosinophilic inflammation, otitis mediа, hearing impairment, nasal polyposis, bronchial asthma.