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Scaphoid fracture is a break in the scaphoid bone, the most commonly fractured carpal bone, typically caused by a fall on an outstretched hand (FOOSH).

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• It is crucial to diagnose early due to risk of avascular necrosis (AVN) and nonunion.

https://www.youtube.com/watch?v=Ga_qCmE8tQY

Anatomy

• The scaphoid spans both rows of the carpus, acting as a mechanical link.
• Blood supply enters distally, making the proximal pole vulnerable to AVN.
• Fractures are classified by location:
  • Distal third (~10%)
  • Waist/middle third (~70–80%, most common)
  • Proximal third (~10–20%) – highest risk of AVN

Clinical Features

Mechanism of Injury:

• FOOSH with wrist extended and radially deviated
• Common in athletes and young adults

Presentation:

• Pain in the anatomical snuffbox
• Tenderness over scaphoid tubercle (volar wrist)
• Pain with axial thumb compression
• Decreased grip strength and wrist extension

Complications