Two Cases of Adenoid Cystic Carcinoma of the Left Main Bronchus and Trachea

좌측 주기관지 및 기관에 발생한 선양낭포성암 2례

Adenoid cystic carcinoma is an uncommon histologic variant of adenocarcinoma which usually arises from the salivary, lacrimal, or other exocrine glands. Characteristics of adenoid cystic carcinoma are its potential for extending long distance submucosally and for perineural invasion. It grows slowly and may have a prolonged course before diagnosis and after treatment. Recently, we have experienced 2 cases of adenoid cystic carcinoma arising from main bronchus and trachea. One case was 58 years old female patient. Her symptoms were productive cough with dyspnea. She has been history of shortness of breath, wheezing and cough during 4 years, which was initially diagnosed as bronchial asthma. The tumor was located on the left main stem bronchus which was obstructed the lumen nearly complete, by CT demonstration. Tissue diagnosis was confirmed as adenoid cystic carcinoma by bronchoscopic biopsy. The patient underwent radiation to relieve a bronchial stenosis caused by her tumor. The patient has remained well and is asymptomatic without evidence of clinical recurrence. The other case was 25 year old female. She complained shortness of breath and inspiratory difficulty during sleep. The tumor was located in upper trachea, which protruded from the posterior wall of the trachea and obstructed the lumen nearly complete, by CT demonstration. Tissue diagnosis was confirmed as adenocystic carcinoma by rigid bronchoscopic biopsy. The patient was underwent operation for removal of the mass and received radiotherapy. The patient has remained well are following up now.

기관이나 주기관지에서 발생한 선양 낭포암은 서서히 진행하며 조기진단이 어렵고 특징적인 임상적 증상이나 소견이 없어 만성적인 호흡기 질환과의 감별 진단이 힘들어서 질환이 상당히 진행된 후에야 발견되는 수가 많고 원격전이가 많으며 또한 대부분 재발하는 특성이 있으므로 치료후 10년이상의 세심한 추적관찰이 필요하다. 저자들은 선양낭포암이 좌측 주기관지에 발생한 58세 여자 환자와 기관후벽에 발생한 25세 여자 환자를 각각 경험하였기에 보고하는 바이다.