Omega sign of epiglottitis

The omega sign refers to the thickened aryepiglottic folds and epiglottis seen in epiglottitis, when the larynx is seen endoscopically or via laryngoscope, and not to the appearance on lateral plain films. CT would show the finding, but placing a child with epiglottitis supine to CT their neck is not only unnecessary but potentially dangerous.

On lateral x-ray of the neck the epiglottis is thickened and appears thumb shaped rather than the usual thin leaf like outline (which is called thumb sign).

Share article

Article Information

rID: 6281
Section: Signs
Tags: refs, stub
Synonyms or Alternate Spellings:
  • Omega sign in epiglottitis

Support Radiopaedia and see fewer ads

Cases and Figures

  • Drag
    Omega

Laryngosco...
    Figure 1: omega shaped epiglottis
    Drag here to reorder.
  • Drag
    Case 1: epiglottitis
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

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

    Alert accept Thank you for updating your details.