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).

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Article information

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

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Cases and figures

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    Figure 1: omega shaped epiglottis
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    Case 1: epiglottitis
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