Radiology Review

What is a batwing or butterfly pattern?

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List five causes of a batwing pattern.

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What are Kerley (septal) lines?

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Golden S Sign

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Hilum overlay sign

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Extrapleural sign

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Open bronchus sign

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Air crescent (meniscus) sign

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Anterior sulcus (double diaphragm) sign

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Apical cap sign

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