1. Primary tracheal schwannoma
Julia Dorfman, MD, Bruce M Jamison, MD, Jean E Morin, MD 
The Annals of Thoracic Surgery 
Volume 69, Issue 1, Pages (January 2000)
DOI: /S (99)

2. Fig 1
Contrast-enhanced computed tomogram of the chest. An intratracheal polypoid mass is seen obstructing 90% of the lumen.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

3. Fig 2
Tracheal mass in situ. The trachea has been transected distal to the lesion (endotracheal tube is within the distal trachea). The mass can be seen within the proximal tracheal segment.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

4. Fig 3
Microscopic examination of tumor showing features of a benign cellular schwannoma (see text for details) (Hematoxylin and eosin stain, magnification ×10).
The Annals of Thoracic Surgery  , DOI: ( /S (99) )