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Updated: May 24, 2026

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Published on: October 31, 2025
Bronchopulmonary dysplasia: then and now
1Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Palo Alto, CA 94304, USA. aphilip@stanford.edu
Bronchopulmonary dysplasia (BPD) has evolved from
Area of Science:
- Neonatal Medicine
- Pediatric Pulmonology
- Respiratory Physiology
Background:
- Bronchopulmonary dysplasia (BPD) is a chronic lung disease in premature infants.
- Historically, BPD was linked to oxygen toxicity and mechanical ventilation.
- The definition and characteristics of BPD have shifted over time.
Purpose of the Study:
- To describe the evolution of bronchopulmonary dysplasia (BPD) from 'classical' to 'new' BPD.
- To outline the changing etiologies and pathological features of BPD.
- To discuss potential preventative and therapeutic strategies for BPD.
Main Methods:
- Literature review of historical and current BPD research.
- Comparison of pathological and radiographic findings in 'classical' versus 'new' BPD.
- Analysis of factors contributing to BPD development.
Main Results:
- 'Classical' BPD, seen in more mature infants, featured lung cysts and fibrosis.
- 'New' BPD, prevalent in extremely preterm infants, shows arrested lung development.
- The definition of BPD has shifted to oxygen requirement at 36 weeks postmenstrual age.
Conclusions:
- BPD has transformed due to advances in neonatal care and surfactant therapy.
- Understanding the distinct features of 'new' BPD is crucial for management.
- Further research into preventative and therapeutic strategies is warranted.
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Assessment