1. Long-term safety and tolerance of silicone and self-expandable airway stents: an experimental study 
Francesco Puma, MD, Raffaele Farabi, MD, Moira Urbani, MD, Stefano Santoprete, MD, Niccolò Daddi, MD, Antonio Di Meo, Rodolfo Gialletti, Adriano Tocchi, MD, Giuliano Daddi, MD 
The Annals of Thoracic Surgery 
Volume 69, Issue 4, Pages (April 2000)
DOI: /S (00)

2. Fig 1
Gianturco group: microscopic features of the stented bronchus. Full-thickness ulceration of the bronchial wall surrounded by a thick layer of chronic inflammatory infiltrate (Hematoxylin & Eosin; ×100).
The Annals of Thoracic Surgery  , DOI: ( /S (00) )

3. Fig 2
Gianturco group: mycotic spores, likely due to Candida infection, at the bottom of an ulceration (PAS; ×400).
The Annals of Thoracic Surgery  , DOI: ( /S (00) )

4. Fig 3
Dumon group: borderline separating normal columnar epithelium from squamous metaplasia (Hematoxylin & Eosin; ×400).
The Annals of Thoracic Surgery  , DOI: ( /S (00) )

5. Fig 4
Dumon group: chronic inflammatory infiltrate bulging towards the bronchial lumen, mainly composed by histiocytes and lymphocytes (granuloma) (Hematoxylin & Eosin; ×100).
The Annals of Thoracic Surgery  , DOI: ( /S (00) )