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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.
Caecal bar sign
- 1. Pinto leite N, Pereira JM, Cunha R et-al. CT evaluation of appendicitis and its complications: imaging techniques and key diagnostic findings. AJR Am J Roentgenol. 2005;185 (2): 406-17. AJR Am J Roentgenol (full text) - Pubmed citation
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