Airway involvement in sarcoidosis.

Sarcoidosis is a common disease and affects the respiratory system in > 90% of cases, most commonly the intrathoracic lymph nodes and the respiratory parenchyma. Less commonly, the airways are involved, and the disease is manifested as mucosal erythema, edema, granularity and cobblestoning, plaques, nodules, and bronchial stenosis, airway distortion, traction bronchiectasis, and bronchiolitis. Airway involvement may lead to airflow limitation. Involvement of oral, nasal, and pharyngeal mucosa may cause hoarseness, dysphagia, laryngeal paralysis, and upper airway obstruction. Airway symptoms are important indicators of airway involvement in sarcoidosis. Pulmonary function testing, radiologic imaging, and bronchoscopy occupy a significant role in the diagnosis and management of airway involvement in patients with sarcoidosis.