TY - JOUR T1 - Airway obstruction caused by retro-laryngeal carcinosarcoma JF - BMJ Case Reports JO - BMJ Case Reports DO - 10.1136/bcr-2019-230302 VL - 12 IS - 5 SP - e230302 AU - Yasuyuki Chida AU - Ryota Inokuchi AU - Hiroaki Kikuchi AU - Kazuaki Shinohara Y1 - 2019/05/01 UR - http://casereports.bmj.com/content/12/5/e230302.abstract N2 - ER -