Abstract

Chronic rhinosinusitis with nasal polyps (CRSwNP) is a heterogeneous disorder characterized by chronic sinonasal mucosal inflammation. CRSwNP can be subdivided into two types based on eosinophilic inflammation: eosinophilic CRSwNP (Eos CRSwNP) and non-eosinophilic CRSwNP (Non-Eos CRSwNP). Eos CRSwNP and Non-Eos CRSwNP demonstrate distinct clinical manifestations, treatment outcomes, and cellular and immunopathologic characteristics. However, currently, there is no unified and generally accepted standard to define the Eos CRSwNP. The aim of this review is to compare the advantages and disadvantages of current methods used to classify Eos CRSwNP, in order to lay foundation for further study.

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