Related Experiment Video
Updated: Jan 31, 2026

P50 Sensory Gating in Infants
Published on: December 26, 2013
An Unusual Case of Noisy Breathing in an Infant
Carmen Leon-Astudillo1, Gi So Lee2, Umakanth Katwa1
1Division of Respiratory Diseases, Boston Children's Hospital, Boston, Massachusetts.
Insights
Laryngomalacia in infants can mimic other conditions. A rare neck mass compressing the airway was diagnosed after initial treatment for laryngomalacia and obstructive sleep apnea failed.
Area of Science:
- Pediatric Otolaryngology
- Neonatal Respiratory Disorders
Background:
- Laryngomalacia is a frequent cause of stridor in neonates, often managed conservatively.
- Diagnostic challenges can arise in differentiating laryngomalacia from other airway obstructions.
Observation:
- A 3-week-old infant presented with worsening noisy breathing and poor weight gain.
- Initial diagnosis of laryngomalacia and obstructive sleep apnea was made, with temporary improvement using CPAP.
Findings:
- Repeated upper airway evaluation revealed a neck mass as the cause of airway compression.
- This case highlights the importance of thorough investigation beyond initial diagnoses.
Implications:
- Accurate diagnosis of airway compression in infants is critical for appropriate management.
- Timely intervention for extrinsic airway compression significantly impacts infant prognosis.
Abstract:
Laryngomalacia is a common cause of chronic noisy breathing that can present as stridor in infants and neonates. Mild cases of laryngomalacia are usually followed clinically and managed conservatively. However, the evaluation and diagnosis could be challenging in some patients. We present a case of a 3-week-old male infant with persistent and worsening noisy breathing, snoring, and poor weight gain, prompting further evaluation. The patient had an initial diagnosis of laryngomalacia and obstructive sleep apnea with complete resolution of loud breathing with continuous positive airway pressure. A repeated evaluation of the upper airway for further investigation led to the diagnosis of a neck mass compressing the airway. We review the clinical presentation, management, and follow-up of this patient, as well as the literature of possible etiologies. In the case of our patient, timely diagnosis and treatment had significant prognostic implications.
Related Concept Videos
Unusual Results
According to the range rule of thumb, any value above or below two standard deviations, 2σ from the mean, μ is considered unusual.
Maximum unusual value =...
Breathing
z Scores and Unusual Values
This score indicates how far a value is from the mean in terms of standard deviation. For example, if a data value has a z score of +1, the researcher can infer that the particular data value is one standard deviation above the mean. If another data...
Mechanism of Breathing I: Inspiration
The respiratory system, an essential network for breathing, comprises the conducting and respiratory zones, each playing a crucial role in the overall process of respiration. Let us explore the detailed mechanism of inspiration, or inhalation, which is the first phase of the respiratory cycle.
Pathway of Air during Inspiration
During inspiration, air enters our body through the nose or mouth and moves through the conducting zone,...
Mechanism of Breathing II: Expiration
Expiration, or exhaling, is a complex physiological process that begins as the inspiratory muscles begin to relax. This relaxation triggers a series of events that epitomize the efficiency of the respiratory system.
Mechanism of Expiration:
Drug Dosing: Infants and Children

