Schlesinger A E, Tucker G F
AJR Am J Roentgenol. 1986 Jun;146(6):1133-6. doi: 10.2214/ajr.146.6.1133.
An elliptically shaped cricoid cartilage, a specific type of congenital subglottic stenosis, is described, and the laryngoscopic and radiographic findings in three cases are discussed. An "hourglass" deformity of the subglottic laryngeal airway on an anteroposterior airway radiograph is suggestive of this diagnosis.
