1. Compression of the Trachea by a Mediastinal Parathyroid Cyst
Erik J Hauet, Marinus A Paul, Marc K.M Salu 
The Annals of Thoracic Surgery 
Volume 64, Issue 3, Pages (September 1997)
DOI: /S (97)

2. Fig. 1
Superior mediastinal mass with displacement and narrowing of the trachea.
The Annals of Thoracic Surgery  , DOI: ( /S (97) )

3. Fig. 2 Large cystic mass at the level of the innominate artery.
The Annals of Thoracic Surgery  , DOI: ( /S (97) )

4. Fig. 3
Wall of the cyst containing clumps of parathyroid cells. (Hematoxylin and azofloxin; ×100 before 50% reduction.)
The Annals of Thoracic Surgery  , DOI: ( /S (97) )