Apple core sign (colon)

Last revised by Michael P Hartung on 11 Oct 2023

Citation, DOI, disclosures and article data

Citation:

Niknejad M, Hartung M, Knipe H, et al. Apple core sign (colon). Reference article, Radiopaedia.org (Accessed on 01 Dec 2023) https://doi.org/10.53347/rID-21967

DOI:

https://doi.org/10.53347/rID-21967

Permalink:

https://radiopaedia.org/articles/21967

rID:

21967

Article created:

1 Mar 2013, Mohammad Taghi Niknejad ◉

Disclosures:

At the time the article was created Mohammad Taghi Niknejad had no recorded disclosures.

View Mohammad Taghi Niknejad's current disclosures

Last revised:

11 Oct 2023, Michael P Hartung ◉

Disclosures:

At the time the article was last revised Michael P Hartung had the following disclosures:

Otsuka Pharmaceutical, Consultant (past)
Innovenn, Inc, Consultant (past)

These were assessed during peer review and were determined to not be relevant to the changes that were made.

View Michael P Hartung's current disclosures

Revisions:

23 times, by 16 contributors - see full revision history and disclosures

Systems:

Gastrointestinal, Oncology

Sections:

Signs, Gamuts

Synonyms:

Napkin ring sign (colon)
Apple-core sign
Apple core sign of the colon
Apple core appearance of the 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.