[A case of mediastinal cyst treated with percutaneous injections and drainage].

A 69-year-old woman visited our hospital for further investigation of a prominence at the right heart border. Chest X-ray, tomography, CT scan and ultrasonography revealed an anterior mediastinal cyst. After admission, we performed needle aspiration, injection of contrast material and drainage. Since the lesion was diagnosed as a benign mediastinal cyst, the patient has been followed up without surgery. CT scan after a two-year period revealed fatty tissue in the area of the lesion without evidence of recurrence.