Presentation
Post trauma wrist pain.
Patient Data
The lateral image shows a small bony fragment along the dorsal aspect of the proximal carpal row, adjacent to the dorsal cortex of the triquetrum, known as the pooping duck sign and suggesting triquetral fracture.
On the lateral radiography of the wrist, the scaphoid is colored in blue, the lunate in yellow, and the visualized posterior part of the triquetrum in red, which resemble a duck. The avulsed triquetral fragment corresponds to poop from the duck.
Case Discussion
Triquetral fracture is the second commonest carpal bone fracture, after the scaphoid and the pooping duck sign on lateral radiograph refers to an avulsed fracture fragment from the dorsal cortex of the triquetrum projects along the dorsal aspect of the bony structures of the wrist.
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