The airway stents restore patency in the face of luminal compromise from intrinsic and/or extrinsic pathologies. Luminal compromise beyond 50% often leads to debilitating symptoms such as dyspnea. Silicone stents remain the most commonly placed stents worldwide and have been the "gold standard" for the treatment of benign and malignant airway stenoses over the past 20 years. Nevertheless, silicone stents are not the ideal stents in all situations. Metallic stents can serve better in some selected conditions. Unlike silicone stents, there are large and increasing varieties of metallic stents available on the market. The lack of prospective or comparative studies between various types of metallic stents makes the choice difficult and expert-opinion based. International guidelines are sorely lacking in this area.KEYWORDS: airway stenting . benign airway stenosis . bronchoscopy . central airway obstruction . self-expandable metallic stentDumon was the first physician to place a dedicated and specially designed airway stent in 1987 in Marseille. This dedicated stent consisted of a silicone tube with small studs on the external surface to reduce migration [1]. Consequently, several companies started to develop other airway stents with silicone and metal. In the last 20 years, numerous reports have been published about the use of selfexpanding and balloon expandable metal stents for the treatment of tracheobronchial malignant and benign stenoses, tracheobronchomalacia (TBM), fistulas and dehiscences [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16].Self-expandable stents are made of a shapememory alloy, generally nitinol (nickel-titanium). When the stent is released, it expands spontaneously to reach its original shape and diameter. On the other hand, balloon expandable metallic stents (the first generation of airway metallic stents) were made of metal (steel) meshes that did not possess a memory shape. A balloon was then necessary to deploy them. Most of these stents had originally been developed for use in the vascular system but were found to be adequate for placement in the central airways after only minor modifications, if any at all. The latest developments include stents made of shape memory alloys and composite stents made from metals and polymers [17][18][19]. But, so far, the Dumon stent (Tracheobronxane Ò , Novatech, La Ciotat, France) remains the most commonly placed stent worldwide. Dumon stents have been the 'gold standard' for the treatment of benign and malignant airway stenoses over the past 20 years [20,21], with two specific designs: straight and Y-shaped (for disease involving the carina) [22]. By the way, it is interesting to notice that, in the Thoracic Endoscopy Unit of Marseille, where the Dumon stent was conceptualized and used, the percentage of silicone stent placement has dropped from 100% in 2000 to 65% in 2013. The remaining 35% of the stents used are now fully covered, selfexpandable, metallic stents (SEMS). This goes to prove that the Dumon stents are not the ideal stents in all situa...