Lobster claw sign (kidney)
Citation, DOI, disclosures and article data
Citation:
Niknejad M, Al Kabbani A, Gaillard F, et al. Lobster claw sign (kidney). Reference article, Radiopaedia.org (Accessed on 22 Mar 2025) https://doi.org/10.53347/rID-21577
rID:
21577
Article created:
Disclosures:
At the time the article was created Mohammad Taghi Niknejad had no recorded disclosures.
View Mohammad Taghi Niknejad's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Henry Knipe had the following disclosures:
- Micro-X Ltd, Shareholder (past)
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
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Lobster claw sign refers to a urographic pattern of papillary excavation that may be seen with renal papillary necrosis.
The lobster claw sign occurs when there is excavation around the edge of the papilla and the contrast material that extends into this excavated region looks like the "claws" of a lobster when viewed en face.
This patterns of papillary excavation is most often seen with
References
- 1. Dyer R, Chen M, Zagoria R. Classic Signs in Uroradiology. Radiographics. 2004;24 Suppl 1(suppl_1):S247-80. doi:10.1148/rg.24si045509 - Pubmed
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