SITE IN PROGRESS
Structural stenosis or obstruction
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Tracheal stenosis
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Stenosis due to mucosal oedema
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Stenosis due to extrinsic compression
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Stenosis due to malignant infiltration
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Stenosis associated with tuberculosis
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Postinfectious stenosis
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Tracheal stenosis due to intramural hematoma
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Bronchial obstruction due to an exophytic lesion
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Stenosis due to fibrin deposition
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Endobronchial band