Pulmonary hamartoma mimicking primary bronchoalveolar cell carcinoma

A 52-year-old man with transitional cell carcinoma underwent a chest CT because of a newly developed pulmonary nodule observed on a chest radiograph. In addition to the nodule, a 2.8×2.4 cm well-circumscribed, pure ground-glass opacity with air cyst formation was incidentally found (figure 1). There was no …