Background:Hypersensitivity pneumonitis (HP) is an interstitial lung disease that develops after inhalation of organic or inorganic antigens in susceptible individuals. The nasal mucosa is constantly exposed to these antigens that can irritate the respiratory mucosa. Objectives: to assess the burden of sinonasal symptoms in HP patients and to evaluate the nasal histopathology in those patients.
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percentage of patients with HP developed nasal mucosa granuloma and lymphocytic infiltrations as detected by nasal endoscopy
Timeframe: 6 months