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Pneumonia complications: Macleod's syndrome (Swyer-James syndrome)


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Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

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Credit: Pneumonia complications: Macleod's syndrome (Swyer-James syndrome). Credit: Wellcome Collection. Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)


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Description

This picture shows a chest x-ray of a child with Macleod's syndrome (Swyer-James syndrome) which developed post-pneumonia. The left lung is smaller than the right and is hyperlucent due to reduced lung blood flow on that side. Macleod's syndrome is a chronic condition that is relatively uncommon. The cause is thought to be a viral pneumonia early in life which causes developmental arrest in the affected lung. There are reduced alveolar numbers, and reduced blood flow to that side, giving the appearance of a small, hyperlucent lung. A CT scan may show areas of abnormality on the opposite side. Bronchiectasis may be found in the more damaged lung, though it is not apparent in this x-ray. Management is symptomatic, with antibiotics and physiotherapy if there is an acute respiratory exacerbation.


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