Apple core sign (colon)

The apple core sign, also known as the napkin ring sign (bowel), is most frequently associated with constriction of the lumen of the colon by a stenosing annular colorectal carcinoma.

Differential diagnosis

The appearance of the apple-core lesion of the colon also can be caused by other diseases 3:

See also

Inspired signs
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Article information

rID: 21967
Section: Gamuts, Signs
Synonyms or Alternate Spellings:
  • Napkin ring sign (colon)
  • Apple core sign of the colon
  • Apple core appearance of the colon

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Cases and figures

  • Figure 1: apple core
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  • Typical apple-cor...
    Figure 2: apple-core lesion - 1
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  • Acute marginal an...
    Figure 3: apple-core lesion - 2
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  • Figure 4: gross pathology - colorectal cancer
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  • Case 1
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  • Case 2
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  • Case 3
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