Os triangulare

Last revised by Ashesh Ishwarlal Ranchod ◉ on 8 Oct 2023

Citation, DOI, disclosures and article data

Citation:

Knipe H, Ranchod A, Niknejad M, et al. Os triangulare. Reference article, Radiopaedia.org (Accessed on 16 Mar 2025) https://doi.org/10.53347/rID-25056

DOI:

https://doi.org/10.53347/rID-25056

Permalink:

https://radiopaedia.org/articles/25056?embed_domain=external.radpair.com%2527%255B0%255Dfavicon.icofavicon.icofavicon.ico

rID:

25056

Article created:

1 Oct 2013, Henry Knipe ◉

Disclosures:

At the time the article was created Henry Knipe had no recorded disclosures.

View Henry Knipe's current disclosures

Last revised:

8 Oct 2023, Ashesh Ishwarlal Ranchod ◉

Disclosures:

At the time the article was last revised Ashesh Ishwarlal Ranchod had no financial relationships to ineligible companies to disclose.

View Ashesh Ishwarlal Ranchod's current disclosures

Revisions:

13 times, by 9 contributors - see full revision history and disclosures

Systems:

Musculoskeletal

Sections:

Anatomy

Tags:

wrist, variant, accessory ossicle

Synonyms:

Os triquetrum secundarium
Os triangulare
Os intermedium antebrachii

The os triangulare (also known as the os intermedium antebrachii or os triquetrum secundarium) is an accessory ossicle located between the ulnar styloid, lunate and triquetrum ^1,2.

They may be unilateral or bilateral and the main differential diagnosis is non-union of an ulnar styloid process fracture ^1,3.