The various appearances of scaphoid fractures and contusions on MRI and an understanding of why fractures in certain areas are more likely to undergo non union or AVN because of the  the vascular supply of the scaphoid.

Image Above: Scaphoid contusion ( blue arrow) is diagnosed by seeing oedema from bone bruising but no fracture line.

Image above: Various appearances of scaphoid fractures.

 

Image above: Vascular supply to the scaphoid is retrograde so the more proximal a fracture is, the higher the chance of non union developing or AVN. Complications more likely with proximal pole fractures and less likely with distal pole fractures. ( Images unknown source).