Congenital Throat Stenosis: Types, Diagnosis and Management
Congenital throat stenosis refers to narrowing present at birth within the pharyngeal, laryngeal or upper oesophageal airway/food passage. The clinically important forms include laryngeal webs, glottic or subglottic stenosis and congenital oesophageal stenosis.
Stridor is a sign, not a diagnosis. First assess airway stability, oxygenation, feeding and growth; severe obstruction requires urgent specialist airway management.
Learning objectives
- Classify important congenital stenoses.
- Recognise stridor, feeding difficulty and aspiration.
- Outline endoscopic and imaging diagnosis.
- Explain airway stabilisation and definitive treatment principles.
Types and mechanisms
| Type | Mechanism and presentation |
|---|---|
| Laryngeal web/glottic stenosis | Incomplete recanalisation joins the vocal folds; weak cry, biphasic stridor or airway distress. |
| Congenital subglottic stenosis | Small fixed airway below the vocal folds without prior intubation or trauma; recurrent croup-like illness or persistent stridor. |
| Posterior glottic stenosis | Congenital forms are rare; restrict vocal-fold movement and may resemble bilateral paralysis. |
| Oesophageal stenosis | Intrinsic narrowing due to abnormal wall development; dysphagia appears as thicker feeds or solids are introduced. |
| Choanal or pharyngeal narrowing | May impair nasal breathing or swallowing and coexist with craniofacial anomalies. |
Clinical features
- Inspiratory or biphasic stridor, weak cry, retractions and cyanotic episodes.
- Feeding fatigue, choking, cough, recurrent chest infection or aspiration.
- Poor weight gain or prolonged feeding.
- Recurrent “croup” or failed extubation suggesting a fixed lesion.
- Progressive dysphagia with solids in congenital oesophageal stenosis.
Differentiate laryngomalacia, vocal-fold paralysis, haemangioma, cyst, vascular ring, tracheomalacia, infection and acquired post-intubation stenosis.
Assessment and investigations
- Assess airway, breathing, circulation and oxygen saturation.
- Take antenatal, birth, intubation, feeding and growth history.
- Flexible nasolaryngoscopy assesses supraglottis and vocal-fold movement.
- Rigid laryngoscopy and bronchoscopy define level, length and severity under controlled conditions.
- CT/MRI is selective for complex airway or vascular anatomy.
- Contrast swallow and endoscopy assess suspected oesophageal narrowing; swallowing evaluation assesses aspiration.
Apnoea, cyanosis, exhaustion, reduced consciousness, severe retractions, silent/weak air entry or inability to manage secretions demands immediate senior airway support.
Management
Initial care
- Keep the child calm, position appropriately and give oxygen when indicated.
- Avoid repeated traumatic airway attempts; involve anaesthesia and ENT early.
- Support hydration and nutrition; use a safe feeding plan where aspiration is suspected.
Definitive care
Mild stable lesions may be observed with growth and serial assessment. Endoscopic options include web division, scar incision, balloon dilation or selected laser treatment. More severe or long stenoses may require laryngotracheal reconstruction, cricotracheal resection or temporary tracheostomy. Oesophageal stenosis may require carefully planned dilatation or surgical resection depending on cause and response.
Management is individualised by age, airway size, stenosis grade, length, comorbidities and previous procedures.
Complications and follow-up
- Acute airway obstruction and hypoxic injury.
- Aspiration pneumonia, feeding aversion and poor growth.
- Voice disturbance after glottic disease or intervention.
- Restenosis, granulation tissue or need for repeat procedures.
Review laryngeal anatomy, swallowing physiology and later upper airway obstruction.
Key examination points
- Congenital stenosis may affect glottis, subglottis or oesophagus.
- Biphasic stridor suggests a fixed central airway lesion.
- Endoscopy defines airway anatomy and severity.
- No prior airway trauma supports a congenital subglottic cause.
- Treatment ranges from observation to reconstruction and must be specialist-led.
References and further reading
- NCBI Bookshelf: Subglottic Stenosis.
- NCBI Bookshelf: Glottic Stenosis.
- NCBI Bookshelf: Stridor in Children.
For education only. Airway emergencies require local emergency protocols and specialist care.
