A dedicated tracheobronchial stent to be used in the treatment of external compression of the main airway is described. This stent is made of molded silicone. Its outside surface bears regularly placed studs to prevent displacement. First results are encouraging. So far, 118 prostheses have been placed in 66 patients. Tolerance was excellent and complications were rare. Migration occurred 12 times: in seven cases an early prototype that was poorly designed had been used. Obstruction was noted in two cases without major problems. Mean follow-up at the time of this writing is three months, with the longest follow-up 19 months.