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Modeling Dysplastic and Functional Lung Alveolar Repair after Influenza Infection
Published on: September 19, 2025
Three children with plastic bronchitis associated with 2009 H1N1 influenza virus infection
Chikako Terano1, Masaru Miura, Ryuji Fukuzawa
1Department of General Medicine, Tokyo Metropolitan Children's Medical Center, Fuchu, Tokyo, Japan.
Insights
Three children developed plastic bronchitis following 2009 H1N1 influenza virus infection. This condition presented with rapid respiratory distress and whole lung atelectasis, suggesting a link between severe H1N1 and this rare respiratory complication.
Area of Science:
- Pediatric Pulmonology
- Infectious Diseases
- Critical Care Medicine
Background:
- Plastic bronchitis is a rare condition characterized by the formation of proteinaceous casts in the bronchial tree.
- The 2009 H1N1 influenza pandemic caused significant respiratory illness in children worldwide.
- Understanding the potential complications of influenza virus infections is crucial for timely diagnosis and management.
Observation:
- This report details three pediatric cases of plastic bronchitis.
- All three children had confirmed 2009 H1N1 influenza virus infection.
- Common clinical features included rapid and progressive respiratory distress.
Findings:
- Radiographic findings revealed whole lung atelectasis in all affected children.
- The clinical presentation suggests a potential association between severe H1N1 influenza and the development of plastic bronchitis.
- This association highlights a severe, albeit uncommon, complication of H1N1 influenza.
Implications:
- Clinicians should consider plastic bronchitis in children presenting with severe respiratory symptoms during H1N1 influenza outbreaks.
- Early recognition and appropriate management may improve outcomes for children with H1N1-associated plastic bronchitis.
- Further research is warranted to elucidate the pathophysiology and incidence of this complication.
Abstract:
We report the cases of 3 children with plastic bronchitis associated with 2009 H1N1 influenza virus infection. These 3 children shared common clinical and radiologic features: rapid and progressive respiratory distress with whole lung atelectasis on chest radiograph. In children with severe respiratory symptoms accompanied by H1N1 influenza, plastic bronchitis should be considered.
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