1Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. jhhan@smc.samsung.co.kr 2Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. 3Department of Thoracic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
ABSTRACT
The mediastinal parathyroid cyst is a very rare cause of space occupying lesions in the mediastinum.We report a case of a non-functioning mediastinal parathyroid cyst that occurred ina 42 year-old male. He suffered from foreign body sensation of the throat whenever he wasin the supine position. A chest computed tomography showed a round cyst with a narrowbase attached to trachea. It was white and tan, thin-walled semi-transparent cyst containingyellow and tan serous fluid. Microscopically it was characterized by a thin fibrous wall linedwith a single or double layer of uniform cells with clear cytoplasm and small nuclei. The liningcells were immunopositive for chromogranin A.