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- congenital disorder which is the most common cause of stridor in infancy
- larynx appears disproportionately small, and supporting structures are abnormally soft
- stridor begins within the first 4 weeks of life, and accentuates with increased ventilation (crying, excitement, URI, etc.)
- stridor usually resolves by 12 months but may recur with URI until about 3 years of age
- diagnosis is by fiberoptic bronchoscopy or direct laryngoscopy
- therapy is usually not needed, but rarely laser therapy of redundant tissue or traceostomy when stridor occurs with failure to thrive or apnea
References
NMS Pediatrics, 4th edition