Elementary Lesions
Elementary Lesions
Bronchial epithelial metaplasia
Characteristics
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Re-epithelialisation of pulmonary alveolar cysts through slippage of the bronchiolar lining
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Passage through the “Lambert channels”: continuity solution between respiratory bronchioles and adjacent alveoli
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Secondary to bronchiolectasis
Diagnostic Orientation
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Bronchiolectasis
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dilatation of the bronchioles’ by traction of the fibrosis on the bronchiolar wall
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opening of the bronchiole in the next alveolus
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Cylindrical bronchiolar epithelium
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ciliated and mucous-secreting
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Bronchiolar wall
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site of muscular cells
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1. Bronchial epithelial metaplasia
2. Bronchial epithelial metaplasia
Residual distended bronchioles in fibrotic area.