“…The diagnosis is suspected by clinical history and most accurately diagnosed by awake dynamic flexible fiberoptic laryngoscopy (FFL) [3 ] with up to 88% reliability regardless of examining physician experience [4]. Typical features include supra-arytenoid tissue prolapse during inhalation, omega-shaped epiglottis, retroflexed epiglottis, short aryepiglottic folds, poor visualization of the vocal folds, and edema of the posterior glottis.…”