An 8-year-old girl was evaluated for hemoptysis, 50 mL/day, which lasted for 3 days. Computed thoracic tomography detected a mass lesion in the right lower lobe. During rigid bronchoscopic examination, exanguinating hemoptysis occurred, and a Fogarty balloon catheter was placed in the right intermediate bronchus. Thoracotomy revealed a 2 x 2-cm mass in the right lower lobe. Common basal segmentectomy was performed. Pathological frozen-section analysis confirmed the diagnosis of perforated hydatid cyst.