Abstract

Computed tomography scan showed an approximately 6 cm sized cystic lesion at anterior mediastinum in a 75-year-old man. At thora­cotomy, the cystic mass was covered by mediastinal pleura. Tumor adhered to sternum, ascending aorta, pericardium and contralateral mediastinal pleura. The tumor was extirpated totally. Pathological diag­nosis was squamous cell carcinoma of the thymus that developed in a thymic cyst. Additional radiation therapy was done. In those cases, al­though surgical resection was done, there wasn’t sufficient data about addition therapy. In our study, we emphasized treatment for these rare lesions.