Mediastinal parathyroid cyst;a case report and review of the literature.

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A 44-year-old man, with no complaint, was admitted to our hospital because of a cystic mass located in the right superior mediastinum. Routine blood chemistry studies revealed no abnormality. In February, 1990 an operation was performed through a midline sternotomy. A thin-walled cyst (15 × 7 × 3 cm), located behind the superior vena cava and to the right of the trachea, contained 150 ml of clear colorless fluid. It was removed en bloc with the right lobe of the thyroid gland. The postoperative course was uneventful. Histological examination showed a cyst lined throughout by a monolayer of cuboidal epithelium. The cyst wall consisted of parathyroid tissue. Mediastinal parathyroid cyst is very rare. Since the first case reported by DeQuervain in 1925, only 30 cases have been reported in the literatures. These are reviewed here.
特定非営利活動法人日本呼吸器外科学会の論文