Napkin ring sign (disambiguation)

Last revised by Craig Hacking on 18 Jan 2024

Citation, DOI, disclosures and article data

Citation:

Deng F, Hacking C, Sharma R, Napkin ring sign (disambiguation). Reference article, Radiopaedia.org (Accessed on 25 Apr 2024) https://doi.org/10.53347/rID-75845

DOI:

https://doi.org/10.53347/rID-75845

Permalink:

https://radiopaedia.org/articles/75845

rID:

75845

Article created:

8 Apr 2020, Francis Deng ◉

Disclosures:

At the time the article was created Francis Deng had no recorded disclosures.

View Francis Deng's current disclosures

Last revised:

18 Jan 2024, Craig Hacking ◉ ◈

Disclosures:

At the time the article was last revised Craig Hacking had the following disclosures:

Philips Australia, Paid speaker at Philips Spectral CT events (ongoing)

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

View Craig Hacking's current disclosures

Revisions:

4 times, by 3 contributors - see full revision history and disclosures

Systems:

Gastrointestinal, Musculoskeletal, Cardiac

Sections:

Signs

Synonyms:

Napkin-ring sign (overview)

The napkin ring sign may refer to either of the following imaging findings:

napkin ring sign (colon): colonic stenosis such as due to colon cancer
napkin ring sign (coronary): coronary artery vulnerable plaque

A clinical napkin ring sign of myotonia (e.g. in myotonic dystrophy) also exists, whereby striking the tongue elicits a characteristic pattern of contractions ¹.

A napkin ring is a decorative household item used in some Western societies to hold cloth napkins in a roll at its center. The imaging metaphor applies to circumferential stenotic lesions.