PT - JOURNAL ARTICLE AU - Yasuyuki Chida AU - Ryota Inokuchi AU - Hiroaki Kikuchi AU - Kazuaki Shinohara TI - Airway obstruction caused by retro-laryngeal carcinosarcoma AID - 10.1136/bcr-2019-230302 DP - 2019 May 01 TA - BMJ Case Reports PG - e230302 VI - 12 IP - 5 4099 - http://casereports.bmj.com/content/12/5/e230302.short 4100 - http://casereports.bmj.com/content/12/5/e230302.full SO - BMJ Case Reports2019 May 01; 12