Case study: Management
A woman in her early 30’s with childhood-onset asthma and allergic rhinitis was evaluated for persistent inflammation despite minimal asthma symptoms and no maintenance therapy. FeNO testing revealed significant airway inflammation, prompting a change in her treatment plan.
Last updated: September 2026
Gender/Age: Female, 30’s
History: Childhood-onset asthma, allergic rhinitis, no maintenance or anti-inflammatory reliever therapy
The patient has Type 2 inflammation, placing her in the high risk catergory due to elevated FeNO and eosinophil levels. Despite mild symptoms and few exacerbations, the inflammation indicated that more proactive treatment was needed to prevent long-term complications.
Eosinophil count: 300 cells/µL
IgE Testing: Positive for dust mite and grass pollen; total IgE 230 kU/L
FeNO Test: 70 ppb, indicating significant airway inflammation
Inhaled Corticosteroid (ICS): The patient was likely to respond well to ICS based on her high FeNO and eosinophil count.
Shared Decision-Making: The patient was educated about the risks of untreated Type 2 inflammation and the benefits of using an anti-inflammatory reliever (such as ICS-formoterol) as needed.
Monitoring: Close follow-up was recommended to ensure that the ICS therapy was effective in preventing future exacerbations.
FeNO testing revealed underlying inflammation in a patient with mild symptoms, highlighting the importance of treating Type 2 inflammation even in seemingly well-controlled asthma. Educating the patient about the risks and benefits of ICS therapy helped them accept the change, improving long-term asthma management.
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