Sail sign of the chest | |
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Differential diagnosis | left lower lobe collapse |
On a chest X-ray, the sail sign is a radiologic sign that suggests left lower lobe collapse.[1] In children, however, a sail sign could be normal, reflecting the shadow of the thymus.[2]
The thymic sail sign or spinnaker-sail sign is due to elevation of the thymic lobes in the setting of pneumomediastinum.[3]
Upper RT (including URTIs, common cold) |
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Lower RT/ lung disease (including LRTIs) |
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Pleural cavity/ mediastinum |
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Other/general |