Fig. 1From: Local eosinophils are associated with increased IgA subclass levels in the sinonasal mucosa of chronic rhinosinusitis with polyp patientsThe inflammatory pattern of sinonasal tissues. a H&E staining and b IHC staining related to CD20+ (representing B cells), CD138+ (representing plasma cells), total IgA+, IgA1+, and IgA2+ cells (indicating IgA producing cells); in healthy controls and CRS patients. Scale bar 100 µm. CRSsNP Chronic rhinosinusitis without nasal polyps, CRSwNP Chronic rhinosinusitis with nasal polypsBack to article page