The arrowhead sign refers to the focal caecal thickening centered on the appendiceal orifice, seen as a secondary sign in acute appendicitis. The contrast material in the cecal lumen assumes an arrowhead configuration, pointing at the appendix.  

The arrowhead sign is applicable only when enteric contrast distends the caecum.

See also

Caecal bar sign

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rID: 12246
Section: Signs
Tag: appendix
Synonyms or Alternate Spellings:
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