Abstract
A 68-year-old man was admitted with complaints of persistant cough. Chest X-ray film showed diffuse interstitial shadows in bilateral lung fields. Bronchofiberscopy revealed a smooth-surfaced hemispherical polypoid lesion about 2mm diameter in the membranous portion of the truncus intermedius. The polypoid lesion was completely removed by a single biopsy. Histological examination showed an inflammatory polyp, and TBLB revealed interstitial pneumonia.