Scaphoid fracture with AVN

Scaphoid Fracture Key Points:

• Most common carpal bone fractured
• 10% of scaphoid fractures have an associated fracture of another bone.
• 70% involve the waist. 10-20% the distal pole and 5-10% the proximal pole.

Avascular Necrosis of the Scaphoid Key Points:

• Occurs in 15-30% of scaphoid fractures
• almost always involves the proximal pole
• Upup to 30% of scaphoid fractures may display increased density of the proximal pole
• the more proximal the fracture, the higher risk of AVN
• Thethe radiographic hallmarks of AVN are collapse and fragmentation
• often reversible
• may be due to relative ischaemia of the proximal pole