Triquetral (left) (Os triquetrum)
Educational content only — not medical advice.
Anatomy
A pyramidal carpal on the medial side of the proximal row, joined to the ulnar styloid by its own ligament and stabilising the medial column of the wrist with the lunate. This is the left member of the pair.
Clinical notes
Its fracture (usually dorsal avulsion after a fall) is the second commonest carpal fracture and can be missed on plain films, needing CT when wrist pain persists.
Related structures
Educational references
FAQ
What is the role of the Triquetral (left)?
A pyramidal carpal on the medial side of the proximal row, joined to the ulnar styloid by its own ligament and stabilising the medial column of the wrist with the lunate. This is the left member of the pair.
Why is the Triquetral (left) clinically important?
Its fracture (usually dorsal avulsion after a fall) is the second commonest carpal fracture and can be missed on plain films, needing CT when wrist pain persists.
Source & license
Derived from Z-Anatomy (Gauthier Kervyn et al.), CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/); upstream geometry from BodyParts3D, © The Database Center for Life Science. license details