Nonsteroidal anti-inflammatory drug (NSAID)-exacerbated respiratory disease (N-ERD) is a clinical syndrome characterized by chronic rhinosinusitis with nasal polyposis (CRSwNP), adult-onset asthma and hypersensitivity to NSAIDs. Long-term aspirin treatment after desensitization (ATAD) is used for clinical improvement in N-ERD patients. However, information on the potential effect of ATAD on the platelet-neutrophil aggregates (PNA) level in N-ERD patients is highly limited.