Musculoskeletal #44

~ EDiR Holders

Clinical Data

39-year-old male:

  • With wrist trauma

Wrist X-ray AP projection
Wrist X-ray lateral projection
Which is the diagnosis?

  • Undisplaced scaphoid fracture

  • Acute boxer’s fracture

  • Dorsal avulsion fracture of the triquetrum

  • No abnormality

Which is the diagnosis?

  • Undisplaced scaphoid fracture – FALSE

  • Acute boxer’s fracture – FALSE

  • Dorsal avulsion fracture of the triquetrum (Red arrow) – TRUE

  • No abnormality – FALSE

    Explanation:

    • Notice also the dorsal soft tissue swelling with air lucencies (Located inside the orange line).




    Triquetral fractures:

    • Second most common carpal bone fracture (after the scaphoid)

    • Fall onto an outstretched hand in ulnar deviation and carpal extension or direct blow to the dorsum of the hand (latter in this case)

    • Almost always dorsal avulsion type

    • Usually only seen on lateral radiographs with the classic “pooping duck” sign




Published by EDiR Holders

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