1Goo JM, lm JG,Ahn JM, et al. Right paratracheal air cysts in the thoracic inlet:clinlcal and radiologie significance [ J ]. A JR Am J Roentgenol, 1999,173:65 - 70.
2Moiler GM, ten Berge E J, Stassen CM. Tracheocele: a rare cause of difficuh endotracheal intubation and subsequent pneumomediasti- num[ J]. Eur Respir J, 1994,7 : 1376 - 1377.
