Manifestation of congenital pulmonary airway malformation in a 26-year-old adult, requiring surgery.

This is a case of type 1 congenital pulmonary airway malformation in the left lower lobe of a 26-year-old male. At the age of 1 year, he developed a pulmonary cystic lesion, which was considered to be bronchopulmonary sequestration. He grew up healthy and showed no impairment during exercise; however, giant bullous lesion development along with compressed left upper lobe and mediastinum was recently noted; consequently, the patient was referred to our hospital for further examination. We diagnosed congenital pulmonary airway malformation and performed left lower lobectomy. Postoperative course was uneventful, but a restrictive change on pulmonary function test did not improve. This unusual course of congenital pulmonary airway malformation with bullous changes suggests the importance of early-stage resection.