Placement of self‑expandable metallic stents for tracheal stenosis secondary to thyroid cancer

Yuasa,Rena; Hata,Yoshinobu; Otsuka,Hajime; Makino,Takashi; Koezuka,Satoshi; Sato,Fumitomo; Tamaki,Kazuyoshi; Sasamoto,Shuichi; Takagi,Keigo; Iyoda,Akira

doi:10.3892/mco.2014.350

Placement of self‑expandable metallic stents for tracheal stenosis secondary to thyroid cancer

Authors:
- Rena Yuasa
- Yoshinobu Hata
- Hajime Otsuka
- Takashi Makino
- Satoshi Koezuka
- Fumitomo Sato
- Kazuyoshi Tamaki
- Shuichi Sasamoto
- Keigo Takagi
- Akira Iyoda
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Affiliations: Division of Chest Surgery, Toho University School of Medicine, Tokyo 143‑8541, Japan, Nishi Yokohama International Hospital, Yokohama, Kanagawa 245‑0062, Japan
Published online on: July 17, 2014 https://doi.org/10.3892/mco.2014.350
Pages: 1003-1008

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Abstract

The indications and suitable approaches for treating upper airway obstruction secondary to thyroid cancer are controversial. Patients with thyroid cancer generally have a good prognosis, but airway stenosis and vocal cord paralysis are not uncommon. Subglottic airway stenting may be challenging, due to stent migration, granulation tissue formation and supraglottic stenosis. In this study, we evaluated the application of covered self‑expandable metallic stents to relieve upper airway obstruction. This was a retrospective study of 5 patients with airway stenosis due to thyroid cancer treated in 2009 and 2010. Immediate airway enlargement was achieved in 3 patients with stenosis at the middle mediastinum. Gradual enlargement over 2 months was observed in the remaining 2 patients with stenosis at the cervical level. The performance status was improved in all 5 patients, including a case with anaplastic carcinoma. The follow‑up averaged 13 months (range, 8‑27 months). Granulation tissue developed at both ends of the stent in 3 patients, sputum was retained in 2 cases and bacterial colonization was detected in all 5 cases. No stent migration was reported. Additional tracheostomy was required in 2 patients, due to proximal tumor growth or progressive bilateral vocal cord paralysis after 10 and 6 months, respectively. In conclusion, stenting for central airway stenosis secondary to thyroid cancer may be beneficial, even in patients with anaplastic carcinoma. Long‑term regular bronchoscopic follow‑up is required to monitor complications, as patients with thyroid cancer are at high risk of granulation tissue formation, sputum retention and bacterial colonization.

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