The levels of type 1 inflammatory factors IFN-γ, IL-1β, and IL-6 and T2 inflammatory factors IL-4 and IL-13 were found to be significantly enhanced in the nasal mucosal tissues of patients with CRSsNP by ELISA (Figures 1(d) and 1(e)). Here, IL4 is linked to chronic rhinosinusitis without nasal polyps.