Dumon Stent for Tracheobronchial Stenosis due to Tumor Invasion and Granulation

Abstract

A Dumon stent was used in 5 patients with tracheobronchial stenosis, that is, 3 cases due to intraluminal tumor invasion and two cases due to granulation after tracheobronchoplasty. For the two patients with severe tracheal stenosis due to tumor invasion, bougienage using a tracheal tube and balloon dilatation during a period of one week made it possible to place the Dumon stent. Patency was obtained in one patient with granulation stenosis who underwent placement of a Dumon stent longer than the lesion. Another patient with granulation stenosis who underwent placement of a Dumon stent just beyond the lesion, however, suffered from recurrence of the stenosis at the central portion of the stent due to the growth of the granulation tissue. For cases with severe tracheal stenosis, bougienage by tracheal tube and balloon dilatation for a period in excess of a week can make it easy and safe to place the Dumon stent. For cases with granulation stenosis after tracheobronchoplasty, it is necessary to place the Dumon stent beyond than the lesion in order to prevent the recurrence of stenosis due to the growth of granulation tissue at the edge of the stent.