前縦隔内に発生した気管支原性囊胞の1例

Bronchogenic Cyst in the Anterior Mediastinum；Report of a Case

はじめに　縦隔に発生する気管支原性囊胞は先天性囊胞の中では比較的頻度の高いものであり，一般的には中縦隔発生が多いとされる．われわれは，比較的まれとされる前縦隔胸腺内に発生した気管支原性囊胞の1例を経験したので報告する．

The case is 61 years old, female. The mediastinal mass was pointed out at a medical examination, and she visited our hospital. A plain computed tomography （CT） scan showed a 12×35 mm mass in the anterior mediastinum, and a thymoma was suspected. Magnetic resonance imaging （MRI） showed low signal at T1-weighted image and high signal at T2-weighted image. A benign cystic mass such as a thymic cyst and a pericardial cyst was suspected, and thoracoscopic resection was performed. Pathologically, a bronchogenic cyst was diagnosed.