Fig. 3

Anterior mediastinal mass (teratoma) in a 59-year-old man. A and B TTE showed a well-circumscribed round cystic-solid mass in front of the aorta and pulmonary artery. C and D Contrast-enhanced CT showed a round like abnormal density shadow with smooth boundary, with liquid and fat density shadow in it, presenting as fat liquid plane, with slightly thick wall and annular calcification and no obvious enhancement. E and F The pathologic diagnosis of this mass was mature cystic teratoma. The wall of the capsule is thick and the structure of bean curd residue can be seen in it. TTE indicates transthoracic echocardiography; CT indicates computer tomograph; AO indicates aorta; AAO indicates ascending aorta; PA, pulmonary artery