The workup of stridor: virtual bronchoscopy as a complementary technique in the diagnosis of subglottic stenosis.

Stridor is predominantly an inspiratory sound that is associated with upper-airway obstruction. Stridor can be caused by a variety of benign and malignant conditions. In an adult with stridor and a history of endotracheal intubation, laryngotracheal stenosis must be considered in the differential diagnosis. Laryngotracheal stenosis is most commonly the consequence of instrumentation, primarily prolonged intubation or tracheostomy.1 Virtual bronchoscopy is a noninvasive imaging technique that reformats images acquired via high-resolution multi-row-detector computed tomography into a 3-dimensional image of the tracheobronchial tree.2 We describe virtual bronchoscopy as part of the workup of a subglottic stenosis.