Crow feet sign (round atelectasis)

Last revised by Craig Hacking on 23 Apr 2020

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.

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: birds feet (photo)
    Drag here to reorder.
  • Case 1
    Drag here to reorder.
  • Case 2
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.