Fig. 12

SNAC arthropathy imaging findings. Posteroanterior radiograph (a), coronal T1-weighted (b) and fat suppressed T2-weighted (c) MRI images of the wrist of the same patient showing a non-united fracture of the scaphoid (white arrows) with a characteristic SLAC-like type of arthropathy. There is joint space narrowing (arrowheads) and osteophyte formation (black arrows) at the articulation between the distal scaphoid fragment and the radial styloid. The articular cartilage and joint space between the proximal scaphoid fragment and the radius are preserved. Avascular necrosis of the proximal scaphoid fragment is suggested by its sclerotic appearance on the radiograph, and relatively hypointense signal on MRI