Air Meniscus Sign
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Air Meniscus Sign

A crescent radiolucency bordering a mass lesion, classically seen in pulmonary hydatid cysts, in which air enters the cyst forming a radiolucency between the outer layer—host—and the inner layer—hydatid membrane—of Echinococcus granulosus
The most common air meniscus in ultrasonography is caused by Aspergillus fumigatus; an air meniscus can be seen on CT scans of the oesophago-gastric junction due to submucosal haematomas of the oesophagus. It may also be seen in lung abscesses, tumours, hematomas, granulomatous infections and Rasmussen’s aneurysm

air meniscus sign

Imaging A crescent-shaped radiolucency bordering a mass lesion, classically seen in pulmonary hydatid cysts, where air enters the cyst forming a radiolucency between the outer layer–host and the inner layer–hydatid membrane of Echinococcus granulosus: the most common AMS in ultrasonography is caused by Aspergillus fumigatus

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Air Meniscus Sign (redirected from Double Rim Sign)

Air Meniscus Sign
(redirected from Double Rim Sign)