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