Air crescent sign

Air crescent sign

In radiology, the air crescent sign is a finding on chest X-ray and/or computed tomography that is crescenteric and radiolucent, due to a lung cavity that is filled with air and has a round radioopaque mass. [Abramson S. The air crescent sign. Radiology. 2001 Jan;218(1):230-2. PMID 11152807. [http://radiology.rsnajnls.org/cgi/content/full/218/1/230 Free Full Text] .] Classically, it is due to aspergilloma (a type of aspergillosis) in the lung. This occurs when "Aspergillus" colonizes a cavity in the lung. [Curtis AM, Smith GJ, Ravin CE. Air crescent sign of invasive aspergillosis. Radiology. 1979 Oct;133(1):17-21. PMID 472287. [http://radiology.rsnajnls.org/cgi/content/abstract/133/1/17?ijkey=657da61e6546d66bd27550542bc4d25be2efe638&keytype2=tf_ipsecsha Free Full Text] .]

References

External links

* [http://radiology.rsnajnls.org/content/vol218/issue1/images/large/r01ja19g1b.jpeg Air cresent sign on CXR] - radiology.rsnajnls.org
* [http://radiology.rsnajnls.org/content/vol218/issue1/images/large/r01ja19g2b.jpeg Air cresent sign on CT] - radiology.rsnajnls.org


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