Congenital subglottic stenosis

Congenital subglottic stenosis is a rare congenital malformation of the larynx characterized by a narrowing of the airway below the vocal cords (the subglottic region) that is present at birth. Unlike acquired subglottic stenosis, which results from intubation injury or other trauma, the congenital form arises from abnormal development of the cricoid cartilage or soft tissue in the subglottic area during fetal life. The condition affects the respiratory system and can range from mild narrowing that may go undetected to severe obstruction that causes significant breathing difficulties in the newborn period. Key clinical features include stridor (a high-pitched breathing sound, particularly during inspiration), recurrent or persistent croup-like episodes, respiratory distress, and difficulty breathing that may worsen with upper respiratory infections or physical exertion. In mild cases, symptoms may not become apparent until the infant develops a respiratory infection that further narrows the already compromised airway. Severe cases may present with significant respiratory distress at birth requiring immediate airway intervention. Management depends on the severity of the stenosis. Mild cases may be managed conservatively with close observation, as the airway grows with the child and symptoms may improve over time. Moderate to severe cases may require surgical intervention, including endoscopic procedures such as balloon dilation or laser treatment, anterior or posterior cricoid split, or laryngotracheal reconstruction using cartilage grafts. In the most severe cases, a tracheostomy may be necessary to secure the airway while awaiting definitive surgical repair or sufficient airway growth. Long-term outcomes are generally favorable with appropriate management, though some patients require multiple interventions.

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