Granulation stenosis caused by a Dumon stent placed for endobronchial tuberculous stenosis

Two patients with cicatric tracheobronchial stenosis caused by tuberculosis who suffered granulation stenosis after placement of a Dumon stent are reported. Dumon stents, which were long enough to cover the stenotic sites, were placed in the trachea and left main bronchus of each patient. Granulation tissue grew at both edges of the stent 3 or 4 months after stent placement, which caused restenosis and necessitated removal of the stents. The authors conclude that a Dumon stent for treatment of tracheobronchial stenosis caused by tuberculosis can cause granulation stenosis at the edges of the stent.