Apple core sign (colon)

Last revised by Mohammadtaghi Niknejad on 26 Jun 2022

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

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: apple core
    Drag here to reorder.
  • Figure 2: apple-core lesion
    Drag here to reorder.
  • Figure 2: apple-core lesion
    Drag here to reorder.
  • Figure 3: gross pathology - colorectal cancer
    Drag here to reorder.
  • Case 1
    Drag here to reorder.
  • Case 2
    Drag here to reorder.
  • Case 3
    Drag here to reorder.
  • Case 4
    Drag here to reorder.
  • Case 5
    Drag here to reorder.
  • Case 6
    Drag here to reorder.
  • Case 7
    Drag here to reorder.
  • Updating… Please wait.

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

     Thank you for updating your details.