Key Findings

• •Craniocaudal distribution: Diffuse
• •Axial distribution: Diffuse
• •Signs of small airways disease (3-density sign, air trapping on expiratory scan)

Teaching Points

1. 1

   Hypoattenuating lobule

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2. 2

   Normal attenuation lung/lobule

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3. 3

   Hyperattenuating lobule

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