Supplementary Files
Keywords
Nasal cytology
Abstract
Background: Rhinitis is the leading cause for consultation in the allergy department. It consists in chronic inflammation of the nasal mucosa. Non-allergic rhinitis with eosinophilic syndrome is characterized by chronic inflammation of the nasal mucosa (> 20% of eosinophils in nasal cytology) in the absence of demonstrable allergy (negative in vivo and in vitro tests); often it is accompanied by other sinonasal conditions (nasal polyposis, chronic rhinosinusitis), and it constitutes a risk factor for the development of obstructive sleep apnea.
Clinical case: Seven-year old girl with rhinorrhea, nasal obstruction, nasopalatine itching, and severe sneezing that limited sleep and school activities. This condition had a seasonal pattern, with important blood (800 eosinophils/μL) and nasal (30%) eosinophilia and absence of demonstrable allergy (negative skin tests, negative specific nasal challenge tests); the non-allergic rhinitis with eosinophilic syndrome diagnosis was verified.
Conclusions: Non-allergic rhinitis with eosinophilic syndrome is considered to be a highly underdiagnosed disease owing to the lack of in vivo nasal tests’ performance; to this underestimation, incorrect nasal etiology and lack of local in vivo tests (nasal specific IgE) are added, which warrants a high degree of diagnostic suspicion by the specialist physician.
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