上皮小体嚢腫の1例

A Case of Parathyroid Cyst

I．はじめに

　上皮小体嚢腫は頸部，上縦隔に発生する比較的まれな疾患である。上皮小体の嚢胞性病変にはいわゆる嚢腫のほかに腺腫などが嚢胞化したものがあり，両者は発生学的にも臨床的にもそれぞれ異った特徴を有する。今回われわれは上皮小体嚢腫の1症例を経験したので文献的考察を加えて報告する。

　Parathyroid cysts are relatively rare lesions of the neck and mediastinum. A 30-year-old female presented a mass in her neck, suspected of a thyroid nodule. At the time of operation, the cyst was found in the left lower pole of the thyroid and surrounded by a well-delineated plane of dissection and filled with yellowish serous fluid. It was diagnosed as a parathyroid cyst histopathologically.

　Thirty-three cases of parathyroid cysts have been reported in Japan. The mean age of patients is 43.4 years and women predominate 3.86 to 1. Parathyroid cysts are most commonly found in the inferior position, especially on the left side.

　It is stressed that the preoperative diagnosis may be confirmed by fluid aspiration examination.