Ivory phalanx
Last revised by Daniel J Bell on 18 Dec 2021
Citation, DOI, disclosures and article data
Citation:
Kurda D, Bell D, Thurston M, et al. Ivory phalanx. Reference article, Radiopaedia.org (Accessed on 18 Apr 2024) https://doi.org/10.53347/rID-33917
rID:
33917
Article created:
29 Jan 2015,
Dylan Kurda
Disclosures:
At the time the article was created Dylan Kurda had no recorded disclosures.
View Dylan Kurda's current disclosures
Last revised:
18 Dec 2021,
Daniel J Bell ◉
Disclosures:
At the time the article was last revised Daniel J Bell had no recorded disclosures.
View Daniel J Bell's current disclosures
Revisions:
5 times, by
5 contributors -
see full revision history and disclosures
Systems:
Sections:
Synonyms:
- Ivory phalanges
- Ivory phalanx sign
Ivory phalanx is a finding of increased radiodensity of an entire phalanx as a result of periosteal and endosteal bone formation.
This sign is a unique and specific radiographic manifestation of psoriatic arthritis, yet it is uncommon and thus of low sensitivity. Nevertheless, it is of particular importance when articular abnormality or resorption of the tufts is absent. It is almost always associated with nail disease of the same digit.
References
- 1. Ory PA, Gladman DD, Mease PJ. Psoriatic arthritis and imaging. Ann. Rheum. Dis. 2005;64 Suppl 2 (suppl_2): ii55-7. doi:10.1136/ard.2004.033928 - Free text at pubmed - Pubmed citation
- 2. Resnick D, Broderick TW. Bony proliferation of terminal toe phalanges in psoriasis: the "ivory" phalanx. J Can Assoc Radiol. 1977;28 (3): 187-9. Pubmed citation
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