2014 Volume 28 Issue 7 Pages 904-909
A 46-year-old woman presented with a right hilar tumor on a chest radiograph. Chest computed tomography revealed a 10-cm well-circumscribed tumor in the anterior mediastinum. On chest magnetic resonance imaging, the tumor had some cystic lesions. The signal intensity of the cystic lesions was slightly lower than that of skeletal muscle on T1-weighted images and higher on T2-weighted images. The tumor was suspected of being a cystic thymoma, and she underwent thymothymectomy. The tumor was diagnosed as mucinous adenocarcinoma of the thymus based on histopathological findings.
