Additional reading
	n Kawashima A et al  CT of posterior mediastinal masses.  Radiographics 1991;11:1045-1067. n Laurent F et al  Mediastinal masses: diagnostic approach.  Eur Radiol. 1998;8(7):1148-59. n Sharma A et al  Patterns of lymphadenopathy in thoracic malignancies. Radiographics. 2004 24(2):419-34. n Jeung M et al  Imaging of Cystic Masses of the Mediastinum  Radiographics 2002; 22: 79-93.