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Triquetral fracture

A triquetral fracture is carpal bone fracture that generally occurs on the dorsal surface of the triquetrum. It may be fractured by means of impingement from the ulnar styloid, shear forces, or avulsion from strong ligamentous attachments.  It is the 2nd commonest carpal bone fracture, after the scaphoid.

Radiographic features

On plain film, dorsal avulsion injuries are best detected on a lateral projection. CT or MR images may be more sensitive than conventional radiographs for detection of avulsion injuries.

Treatment

Surgical intervention is rarely required, but a persistently symptomatic chip fracture may require excision.

Differential diagnosis

Imaging differential considerations include


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