Distribution, subtype population, and IgE positivity of mast cells in chronic rhinosinusitis with nasal polyps

Chronic rhinosinusitis with nasal polyps (CRSwNP) has been categorized into 2 subtypes in the Asian population: eosinophilic chronic rhinosinusitis (ECRS; similar to CRSwNP in Western countries) and non-ECRS (characterized by inflammation dominated by T-helper cell type 1). The pathogenesis of CRSwNP and the role of mast cells are poorly understood.

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