FUT4 and bronchogenic cyst: Among these reports, the elevated biomarkers included CA 19-9 (14 cases), CA 125 (5 cases), CEA (5 cases), CA 50 (1 case), CYFRA 21-1 (1 case), NSE (1 case), NCC-ST-439 (1 case), free normetanephrine (1 case), and sialyl Lewis X-i (SLX; 3 cases), which were all decreased to within the normal range after resection of the sequestrated lung tissues, regardless of the concomitant ovarian cyst, bronchogenic cyst or mycosis.