What is Laryngomalacia

Laryngomalacia is the most common cause of noisy breathing in infants, occurring when the tissues of the larynx (voice box) are softer than usual and collapse inward during inhalation. While most cases are mild and resolve on their own by age two, some infants require clinical monitoring or surgical intervention to manage breathing and feeding difficulties.

What is the underlying cause of Laryngomalacia?

The pathophysiology of Laryngomalacia involves the structural immaturity of the laryngeal cartilage. Because the tissues above the vocal cords are unusually floppy, they are pulled into the airway when the baby breathes in, creating a high-pitched sound known as stridor. While the exact cause is not fully understood, it is considered a developmental delay in the maturation of the laryngeal skeleton, often exacerbated by gastroesophageal reflux disease (GERD), which can cause inflammation and swelling of these already soft tissues.

Who is typically affected by Laryngomalacia?

Laryngomalacia is a congenital condition, meaning it is present at birth. Symptoms usually appear within the first few weeks of life, often peaking in severity between 4 and 8 months of age. It is noted to be slightly more common in males than in females. While it is the most frequent congenital abnormality of the larynx, its exact global prevalence is difficult to pinpoint because many mild cases go undiagnosed.

What are the key clinical features and classifications?

Clinicians often classify Laryngomalacia based on the specific area of the larynx involved and the severity of the obstruction. Patients generally present with the following clinical markers:

• Stridor: A high-pitched, vibrating sound during inhalation that often worsens when the infant is crying, feeding, or lying on their back.


• Feeding difficulties: Infants may tire easily during feeds or show signs of poor weight gain.


• Positional changes: Symptoms frequently improve when the infant is placed in a prone (tummy) position or held upright.


• Reflux association: Approximately 80% of infants with Laryngomalacia also exhibit symptoms of silent or overt acid reflux.

How is Laryngomalacia differentiated from other conditions?

It is vital to distinguish Laryngomalacia from other airway anomalies like subglottic stenosis or vocal cord paralysis. Unlike structural narrowing (stenosis), Laryngomalacia is characterized by dynamic collapse. At DiseaseMaps.org, we have seen members share their experiences with these symptoms, highlighting the importance of a formal diagnosis via flexible laryngoscopy performed by a pediatric otolaryngologist.

Next steps

• Consult a pediatric otolaryngologist (ENT) for a definitive diagnosis via flexible airway evaluation.


• Monitor your infant’s weight gain and respiratory rate closely.


• Join our community at DiseaseMaps.org to connect with other parents navigating this diagnosis.


• Discuss reflux management with your pediatrician if your baby shows signs of frequent spit-ups or arching during feeds.

Medical disclaimer: This information is for educational purposes and does not replace professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Laryngomalacia Overview.


• Orphanet: Congenital Laryngomalacia (ORPHA: 99933).


• American Academy of Pediatrics (AAP): Clinical guidelines on pediatric airway management.


• PubMed Central: "Management of Laryngomalacia: A Systematic Review."