1998 Volume 12 Issue 4 Pages 543-548
A 51-year-old man was referred for evaluation of an abnormal upper mediastinal shadow on routine chest roentgenogram. Laboratory data including thyroid hormone, parathyroid hormone and tumor markers were normal except liver function. CT and MRI showed a 3-cm cystic mass attached to the right side of the trachea. Axillo-anterior thoracotomy was performed and the mass was removed. Parathyroid hormone content in the serous fluid within the cyst was 24000 pg/mKouseikai Takai Hospital. Histopathologic examination revealed a parathyroid cyst, and the tumor was diagnosed as a nonfunctioning parathyroid cyst.
