A resected case of intrapulmonary bronchogenic cyst with elevated serum level of CA19-9

Abstract

A rare case of intrapulmonary bronchogenic cyst is reported. A 47-year-old man was referred to our institution for an abnormal shadow on chest roentogenogram. It showed an elliptic mass in the right lower lung field. CT scan and MRI examination revealed a cystic tumor in the right lower lobe of lung. His serum CA19-9 level was 163.9 U/ml (normal≤37). The patient underwent surgical exploration. Operative findings showed a cystic mass lying in abnormal accessory fissures of the lower lobe. Partial resection of the lower lobe was performed. Histopathological examination showed a bronchogenic cyst. CA19-9 in the cyst fluid was elevated as 299, 300 U/ml. The serum CA19-9 level returned to normal after operation. Five cases, including this case, of bronchogenic cysts with high serum level of CA19-9 have been reported . The cause of its rise is not so clear.