title: Unexpected difficult intubation caused by subglottic ring.
authors.forename: A
authors.initials: A
authors.lastname: Ceron
authors.forename: V
authors.initials: V
authors.lastname: Ambroselli
authors.forename: C
authors.initials: C
authors.lastname: Zannoni
authors.forename: D
authors.initials: D
authors.lastname: Bertollo
mesh_terms: D000768:Anesthesia, General; D000075202:Contraindications; D005260:Female; D006801:Humans; D007442:Intubation, Intratracheal; D008875:Middle Aged; D009767:Obesity, Morbid; D014135:Tracheal Stenosis / Q000150:complications*