Abstract
A 37-year-old man was referred to our hospital for right chest pain caused by an infected bulla. Chest radiograph and computed tomography revealed intrabullous fluid in the right upper lung lobe. A right upper lobectomy was performed, because the lung was severely affected. Histologically, epithelioid granuloma with Langhans' giant cell presence, negative for Ziehl-Neelsen staining, was seen in the dense fibrous cystic wall. Fluid culture was negative for general bacteria, but positive for Mycobacterium avium. Cases of infected bulla caused by mycobacteria are very rare.
