Background: Fractional exhaled nitric oxide (FeNO) is useful in the management of asthma and predicting the efficacy of standard corticosteroids and biologics. However, the diagnostic value of FeNO in asthmatic chronic rhinosinusitis with nasal polyps (CRSwNP) remains unclear.
Objective: We assessed FeNO levels in patients with CRSwNP and evaluated the diagnostic value of FeNO for screening type 2 CRSwNP (T2-CRSwNP) with asthma.
Objective: The recurrence of chronic rhinosinusitis (CRS) after functional endoscopic sinus surgery (FESS) is influenced by various factors, potentially including the endotype based on the molecular pathophysiology of CRS. This study investigated differences in the recurrence pattern of CRS by endotype after primary FESS.
Methods: This retrospective study enrolled patients who had undergone revision FESS for recurrent CRS.