気胸と誤診された巨大肺囊胞の1例

Giant Bullae Misdiagnosed as Pneumothorax：Report of a Case

はじめに　肺囊胞の中でも一側胸腔内の1/3以上を占めるものは巨大肺囊胞と定義され，さらに2/3以上を占めるものはvanishing lung syndromeと呼ばれるが，症状と胸部X線像から気胸と誤診される場合もある．われわれは，気胸と誤診されて胸腔ドレーンを挿入された症例を経験したので報告する．

A 46-year-old man was taken to a hospital by ambulance because of sudden onset of dyspnea, and was inserted chest drainage tube with a diagnosis of right-sided tension pneumothorax on chest X-ray. Since the chest drainage was not effective, he was transferred to our institute. Based on chest computed tomography （CT） findings, a diagnosis of giant bullae of the right lung was made, and surgical treatment was performed. Postoperatively, the improvement of respiratory function was confirmed.