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The lobes of the lung are held in place by negative intrapleural pressure. In the presence of a large pneumothorax this support is removed and the upper lobe bronchus can bend under the weight of the lobe, resulting …
Competing interests: None declared.
Contributors: RM and RSM had the idea for the article. RM wrote the paper and conducted the literature search. RSM revised the manuscript and is the guarantor.
Patient consent: Obtained.
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