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Characterization of immunoglobulin E plasma cells that are elevated in the upper airway mucosa of nonatopic patients with chronic rhinosinusitis without nasal polyps

The immunologic mechanisms driving inflammation in the upper airways of patients with chronic rhinosinusitis (CRS) are poorly understood. Previous studies have shown that B cells and immunoglobulin E (IgE) levels are elevated in the nasal tissue of patients with atopic chronic rhinosinusitis without nasal polyps (CRSsNP). However, less is known regarding B cell subsets and IgE‐producing plasmablasts in nonatopic CRSsNP patients.