Os triangulare
Citation, DOI, disclosures and article data
Citation:
Knipe H, Ranchod A, Niknejad M, et al. Os triangulare. Reference article, Radiopaedia.org (Accessed on 03 Dec 2024) https://doi.org/10.53347/rID-25056
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rID:
25056
Article created:
Disclosures:
At the time the article was created Henry Knipe had no recorded disclosures.
View Henry Knipe's current disclosures
Last revised:
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
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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.
Differential diagnosis
- lunula: lies at the tip of the ulnar styloid
- persistent ulnar styloid ossicle
- old ununited ulnar styloid fracture
References
- 1. Lewis OJ, Hamshere RJ, Bucknill TM. The anatomy of the wrist joint. J. Anat. 1970;106 (Pt 3): 539-52. Free text at pubmed - Pubmed citation
- 2. Doyle JR, Botte MJ. Surgical Anatomy of the Hand and Upper Extremity. Lippincott Williams & Wilkins. (2003) ISBN:0397517254. Read it at Google Books - Find it at Amazon
- 3. Keats TE, Anderson MW. Atlas of Normal Roentgen Variants That May Simulate Disease. Saunders. (2012) ISBN:0323073557. Read it at Google Books - Find it at Amazon
- 4. Timins ME. Osseous anatomic variants of the wrist: findings on MR imaging. AJR Am J Roentgenol. 1999;173 (2): 339-44. doi:10.2214/ajr.173.2.10430131 - Pubmed citation
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Related articles: Anatomy: Upper limb
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skeleton of the upper limb
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- accessory ossicles of the shoulder
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accessory ossicles of the wrist (mnemonic)
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- os epilunate
- os epitriquetrum
- os styloideum
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- lunula
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pectoral girdle
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shoulder joint
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- joint capsule
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- ligaments
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- scapulothoracic joint
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glenohumeral joint
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- arm abduction
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- arm internal rotation (medial rotation)
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- arterial supply - scapular anastomosis
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shoulder joint
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elbow joint
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wrist joint
- articulations
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ligaments
- intrinsic ligaments
- extrinsic ligaments
- radioscaphoid ligament
- dorsal intercarpal ligament
- dorsal radiotriquetral ligament
- dorsal radioulnar ligament
- volar radioulnar ligament
- radioscaphocapitate ligament
- long radiolunate ligament
- Vickers ligament
- short radiolunate ligament
- ulnolunate ligament
- ulnotriquetral ligament
- ulnocapitate ligament
- ulnar collateral ligament
- associated structures
- extensor retinaculum
- flexor retinaculum
- joint capsule
- movements
- alignment
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hand joints
- articulations
- carpometacarpal joint
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metacarpophalangeal joints
- palmar ligament (plate)
- collateral ligament
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interphalangeal joints
- palmar ligament (plate)
- collateral ligament
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- ossification centers
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pectoral girdle
- spaces of the upper limb
- muscles of the upper limb
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- posterior compartment of the arm
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anterior compartment of the forearm
- superficial
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- deep
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posterior compartment of the forearm (extensors)
- superficial
- deep
- muscles of the hand
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accessory muscles
- elbow
- volar wrist midline
- palmaris longus profundus
- aberrant palmaris longus
- volar wrist radial-side
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- flexor indicis profundus
- flexor carpi radialis vel profundus
- accessory head of the flexor pollicis longus (Gantzer muscle, common)
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- dorsal wrist
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arteries
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- axillary artery
- brachial artery (proximal portion)
- ulnar artery
- radial artery
- veins
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arteries
- innervation of the upper limb
- intercostobrachial nerve
-
brachial plexus (mnemonic)
- branches from the roots
- branches from the trunks
- branches from the cords
- lateral cord
- posterior cord
- medial cord
- terminal branches
- lymphatic drainage of the upper limb
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