Abstract
A 34-year-old woman visited our clinic with a dry cough and exertional dyspnea. Chest HRCT showed diffuse centrilobular nodules in the bilateral lung fields. Bronchoscopy showed glossy, uneven polypoid lesions with a diameter of 2 to 3 mm located at the right B1/B2, right B3a/B3b, and right middle/lower lobe bifurcations. Histologic examination revealed that these were inflammatory bronchial polyps characterized by lymphocyte infiltration with lymphoid follicle formation. She kept five parakeets in her room. Since she was positive for the exposure challenge test and precipitating antibodies, she was diagnosed as having hypersensitivity pneumonitis (bird fanciers' lung). Because hypersensitivity pneumonitis (HP) has not been reported to cause bronchial polyps, the present patient is a rare case of HP associated with central airway lesions.
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