Signet ring sign (renal papillary necrosis)

Last revised by Henry Knipe on 16 Nov 2023

Citation, DOI, disclosures and article data

Citation:

Wilczek M, Knipe H, Signet ring sign (renal papillary necrosis). Reference article, Radiopaedia.org (Accessed on 14 Jun 2024) https://doi.org/10.53347/rID-178626

DOI:

https://doi.org/10.53347/rID-178626

Permalink:

https://radiopaedia.org/articles/178626

rID:

178626

Article created:

16 Nov 2023, Mateusz Wilczek

Disclosures:

At the time the article was created Mateusz Wilczek had no financial relationships to ineligible companies to disclose.

View Mateusz Wilczek's current disclosures

Last revised:

16 Nov 2023, Henry Knipe ◉

Disclosures:

At the time the article was last revised Henry Knipe had the following disclosures:

Integral Diagnostics, Shareholder (ongoing)
Micro-X Ltd, Shareholder (ongoing)

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

View Henry Knipe's current disclosures

Revisions:

3 times, by 2 contributors - see full revision history and disclosures

Systems:

Urogenital

Sections:

Signs

Tags:

cases, case3, refs

The signet ring sign has been described as one of the possible appearances of the papillary excavation seen in renal papillary necrosis on intravenous urography or retrograde urography ¹. The contrast fills a circumferential necrotic cavity around the tip of the necrotic papilla.