Asymptomatic Pulmonary Actinomycosis with Multiple Lung Nodules: Successfully Diagnose by Bronchoscopy

We describe a patient without symptoms and with multiple lung nodules, which was diagnosed as actinomycosis by bronchoscopy. Pulmonary actinomycosis shows a variety of features in chest images. However, multiple nodular lesions are very rare. We believe the infection was spread through the airway by oral infection. An anaerobic culture obtained from the bronchial washing fluid was useful.