Meniscus Sign

Meniscus Sign

Colon A radiolucency typically seen in a barium enema of a child with intussusception, which consists of a rounded apex of the intussusceptum protruding into the column of contrast material
Lung Air meniscus sign

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meniscus sign

Air crescent sign Radiology A semilunar radiolucency peripheral to a pulmonary mass described as typical of echinococcal infection/hydatid cyst disease; most common cause in the US for the MS is a fungus 'ball', usually due to Aspergillus fumigatus; it may be seen in lung abscesses, tumors, hematomas, granulomatous infections and Rasmussen's aneurysm