We herein report the cases of three patients with chest symptoms or fever and diffuse wall thickening of the trachea and main bronchi on chest CT. They were diagnosed with various causes of inflammations of the trachea and main bronchi using bronchial or tracheal biopsy specimens and flexible bronchoscopy.
Keywords: airway wall thickness; eosinophil; immunoglobulin G4; plasmacyte; tracheobronchitis.
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