Costal hook sign (flail chest)

The costal hook sign is a chest x-ray feature seen in some cases of flail chest. It represents the rotation of a fractured rib along its long axis, something that is only possible if a second fracture is present along its length, even if the second fracture is not visible 1

Share article

Article information

rID: 57330
System: Chest, Trauma
Section: Signs
Tag: ribs
Synonyms or Alternate Spellings:
  • Flail chest (costal hook sign)

Support Radiopaedia and see fewer ads

Updating… Please wait.

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

 Thank you for updating your details.