Crow feet sign (round atelectasis)

Crow feet sign is a characteristic, but uncommon, feature seen in round atelectasis.

On CT, this is seen as linear bands radiating from a mass into adjacent lung tissue resembling the feet of a crow. This sign should not be confused with fibrotic changes occurring in the lung.

Inspired signs

Article information

rID: 31124
System: Chest
Section: Signs
Synonyms or Alternate Spellings:
  • Crows feet bands
  • Crow foot sign
  • Crow's feet sign

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Cases and figures

  • Figure 1: birds feet (photo)
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  • Case 1
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  • Case 2
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