A 40-year-old construction worker has noted increasing shortness of breath and cough over many years. On physical examination bilateral inspiratory crackles are heard. Chest x-ray shows eggshell calcifications in hilar adenopathy and bilateral small nodular interstitial markings in the upper lobes.
Lymphangioleiomyomatosis Bronchoalveolar carcinoma of the lung Silicosis Eosinophilic pneumonia