기관지성 낭종은 보통 단순 흉부 사진상 폐실질이나 종격동 내에 얇고 때끄러운 벽을 가지며 경계가 뚜렷한 원형의 종괴 흑은 낭포로 발견되고 보통 Hounsfield Number 0-20의 음영을 가진다. 본 증례는 단순 흉부 방사선 소견 상 폐실질내 경계가 불분명한 종괴로 보이고 CT상 Hounsfield Number 26의 연조직 음영을 보여 폐암을 배제하기 위하여 수술까지 하였던 경우였기에 보고하는 바이다.
Bronchogenic cysts are generally presented as a well defined mass that have thin and smooth wall in the intrapulmonary or mediastinal area by simple chest radiographs. We present the case of a 20-year-old man with a ill-defined left upper lobe mass, found by chest radiographs. At the preoperative examinations, chest computed tomography showed ill-defined mass with Hounsfield Number 26, and nonspecific findings were shown by the bronchoscopy and percutaneous needle aspiration. The patient was undertaken the left upper lobectomy. The surgical specimen contained a ill-defined mass, measuring $2{ imes}3$ cm. On the section of the mass, a cyst containing dark brown thick materials was noted. The cyst was unilocular, and the wall showed a trabeculation. Microscopically, the cystic mass was lined with ciliated pseudostratified columnar epitheliums and surrounded by smooth muscle and cartilage.
