Abstract
A 54-year-old man was admitted to our hospital for an abnormal chest shadow detected by mass screening. His shadow had not changed for 9 years. Chest computed tomography (CT) and magnetic resonance imaging (MRI) demonstrated an 8 cm tumor in the left dome of the diaphragm. 2-deoxy-2 [fluorine-18] fluoro-D-glucose (FDG) positron emission tomography (PET) showed no abnormal uptake of FDG. We suspected a solitary fibrous tumor of the pleura, a posterior mediastinal tumor, or a tumor of the diaphragm, and performed thoracoscopic surgery. The tumor had an abnormal artery from the descending aorta and was resected using a stapling device. Intraoperative pathological diagnosis using a frozen section was bronchogenic cyst and the final diagnosis was extralobar pulmonary sequestration. Thoracoscopic surgery is useful to diagnose and treat intra-thoracic tumors, for which differential diagnosis is difficult.
