好酸球性肺炎加療中に肺気瘤を形成し気胸を発症した1例

Pneumothorax Due to Formation of Pneumatocele During Treatment of Eosinophilic Pneumonia：Report of a Case

はじめに　肺気瘤（pneumatocele）は肺実質内にできる薄壁の含気性囊胞性病変であり，一般的には外傷や感染を契機に発症することが多い．病因としては，肺実質の損傷や破壊，気道腔のチェックバルブ様の狭窄などが考えられている．われわれは，好酸球性肺炎を契機に肺気瘤を形成し気胸を発症した症例に手術加療を行った．

The patient was a 79-year-old male. During the course of treatment for eosinophilic pneumonia, he developed left-sided pneumothorax. Despite the implementation of thoracic drainage, air leakage persisted. Computed tomography （CT） revealed a left pneumatocele, which was deemed to be the underlying cause of pneumothorax. Consequently, thoracoscopy-assisted operation was performed. Six months postoperatively, no recurrence of pneumothorax was observed, and the pneumatocele had significantly decreased in size. Surgical intervention for refractory pneumothorax associated with pneumatocele is therefore considered to be an appropriate and effective therapeutic approach.