To investigate whether or not difference in CT findings between NP subtypes is associated with various immunologic biomarkers, total IgE levels of nasal tissue homogenates and mRNA expression levels of IL–4, IL–5, IL–13, IFN-γ, TNF-α, IL-17A, IL–22, IL-23p19, TGF-β1, TGF-β2, TGF-β3, and periostin were assessed in CRSwNP patients (N = 62, Fig 4). The gene discussed is IL17A; the disease is chronic rhinosinusitis with nasal polyps.