Inspiratory stridor is common.

Crowing sound when inhaling (inspiratory stridor)

Laryngomalacia results in partial airway obstruction, most commonly causing a characteristic high-pitched squeaking noise on inhalation (inspiratory stridor).

Notably, vocal cord dysfunction was diagnosed by laryngoscopy in 5 of the patients, while in the remaining patients it was diagnosed based on symptoms such as inspiratory stridor with exercise, and/or blunting of the inspiratory loop during pulmonary function testing.

Pemberton's sign is the development of facial flushing, distended neck and head superficial veins, inspiratory stridor and elevation of the jugular venous pressure (JVP) upon raising both of the patient's arms above his/her head simultaneously, as high as possible (Pemberton's maneuver).