Air crescent sign
Medical condition
Air crescent sign | |
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The arrows denote an ill-defined nodular opacity in medial aspect of right upper lobe with ill-defined rim of lucency surrounding it | |
Differential diagnosis | Aspergilloma |
In radiology, the air crescent sign is a finding on chest radiograph and computed tomography that is crescenteric and radiolucent, due to a lung cavity that is filled with air and has a round radiopaque mass.[1] Classically, it is due to an aspergilloma, a form of aspergillosis, that occurs when the fungus Aspergillus grows in a cavity in the lung.[2] It is also referred as Monad sign.[3]
Additional images
References
- ^ Abramson S (January 2001). "The air crescent sign". Radiology. 218 (1): 230–2. doi:10.1148/radiology.218.1.r01ja19230. PMID 11152807.
- ^ Curtis AM, Smith GJ, Ravin CE (October 1979). "Air crescent sign of invasive aspergillosis". Radiology. 133 (1): 17–21. doi:10.1148/133.1.17. PMID 472287.
- ^ Goel, Ayush. "Pulmonary aspergillosis". Mediconotebook. Retrieved 29 May 2015.
External links
- Air crescent sign on CXR
- Air crescent sign on CT
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Radiologic signs
- Aortic unfolding
- Dense artery sign
- Halo sign
- Air crescent sign
- Deep sulcus sign
- Golden S sign
- Hampton hump
- Kerley lines
- Peribronchial cuffing
- Sail sign of the chest
- Silhouette sign
- Steeple sign
- Thumbprint sign
- Traction bronchiectasis
- Tree-in-bud sign
- Westermark sign
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