Trapezoid fracture

Background

• Extremely rare (<1% of all carpal fractures)
• Occurs via axial load onto second (index) metacarpal

Clinical Features

• Tenderness along radial aspect augmented by applying pressure along second metacarpal

Differential Diagnosis

Carpal fractures

AP view

• Scaphoid fracture
• Lunate fracture
• Triquetrum fracture
• Pisiform fracture
• Trapezium fracture
• Trapezoid fracture
• Capitate fracture
• Hamate fracture

Evaluation

• Difficult to visualize on x-ray; CT or MRI may be necessary

Management

• Thumb spica splint

See Also

• Carpal fractures