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 rep orted. Dumon stents, which were long enough to cover the stenotic sites, we re placed in the trachea and left main bronchus of each patient. Granulatio n tissue grew at both edges of the stent 3 or 4 months after stent placemen t, which caused restenosis and necessitated removal of the stents. The auth ors conclude that a Dumon stent for treatment of tracheobronchial stenosis caused by tuberculosis can cause granulation stenosis at the edges of the s tent.