Detecting Airway Involvement in Non-Asthmatic Eosinophilic Disorders: Diagnostic Utility of Fractional Exhaled Nitric Oxide (FeNO)

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Discussion

Retrospective analysis shows FeNO levels indicate airway involvement in eosinophilic disorders, suggesting diagnostic potential.

Increased FeNO levels indicated airflow obstruction and clinical symptoms in patients with eosinophilic disorders.
Patients with eosinophilia and symptoms showed potential for FeNO to aid in diagnosis, despite eosinophil levels not predicting airway involvement.
The study included 14 adult patients with confirmed eosinophilia, emphasizing the need for larger cohort studies for validation.
FeNO measurement could enhance the diagnostic process for bronchial eosinophilic inflammation in non-asthmatic conditions.

Raoul et al. (2025) studied this question.

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