Sail sign of the chest

Short description: Pattern seen in radiologic examinations

Sail sign of the chest

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]

## References

1. ↑ "Pneumomediastinum: old signs and new signs.". AJR Am J Roentgenol 166 (5): 1041–8. 1996. doi:10.2214/ajr.166.5.8615238. PMID 8615238.
2. ↑ "THYMIC SAIL SIGN". http://www.mypacs.net/cases/THYMIC-SAIL-SIGN-8221.html.
3. ↑ Zylak, Christopher M.; Standen, James R. (July 2000). "Pneumomediastinum Revisited". RadioGraphics 20 (4): 1043–1057. doi:10.1148/radiographics.20.4.g00jl131043. ISSN 0271-5333.

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