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Ectopic Thymus: An Unusual Case of Subglottic Mass
Irene Paraboschi1,2, Federica Fati1, Francesca Rizzo3
1DINOGMI University of Genoa, Genoa, Italy.
The Annals of Otology, Rhinology, and Laryngology
|July 20, 2019
Summary
Subglottic ectopic thymus is a rare cause of airway obstruction in infants. Early consideration in diagnosis can prevent unnecessary surgeries for this benign condition.
Area of Science:
- Pediatric Surgery
- Otorhinolaryngology
- Pediatric Pathology
Background:
- Ectopic thymus, thymic tissue outside its normal location, is rare.
- It can present as a mass causing airway obstruction in children.
- Diagnosis is often delayed due to its rarity.
Observation:
- A 7-month-old boy presented with severe biphasic stridor and airway obstruction.
- Diagnostic work-up suggested a subglottic mass.
- Surgical excision and histopathology confirmed subglottic ectopic thymus.
Findings:
- Subglottic ectopic thymus is rare, with only four prior English literature reports.
- Preoperative diagnosis is challenging, often mistaken for malignancy or inflammatory conditions.
- Histopathology is definitive for diagnosis after surgical removal.
Implications:
- Subglottic ectopic thymus should be considered in the differential diagnosis of pediatric airway obstruction.
- Early recognition can prevent misdiagnosis and unnecessary extensive surgical interventions.
- This case highlights the importance of considering rare entities in pediatric airway management.
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