(1A) Endoscopic image of a severe subglottic tracheal stenosis; (1B) CT coronal view of the tracheal stenosis; (1C) 3D cervical reconstruction of upper airway area; (2A) intraoperative cross-field ventilation; (2B) intraoperative picture of tracheal anastomosis by single stiches; (2C) post-operative endoscopic check of trachea resection