Fig. 1
From: Single-port thoracoscopic removal of an azygos vein aneurysm: a case report and literature review
A Chest contrast-enhanced CT revealed that the mass located at the tracheal bifurcation. B Bronchoscopy revealed external pressure stenosis at the bronchial origin of the left lower lobe. C Three-dimensional reconstruction showed that the mass is a hemangioma originating from the azygos vein arch. There were two arteries from the aorta running among the tumor body, the esophagus and the trachea. D The tumor body obviously extruded the esophagus and trachea