humpback deformity of the scaphoid
Humpback deformity of the scaphoid results from volar angulation of the proximal and distal poles of the scaphoid in the setting of scaphoid fracture through the waist . The dorsal component forms a 'humpback' which can be palpated.
It is important to identify as it can result in a progressive collapse of the scaphoid with non-union, and even if an eventual union is achieved, destabilisation of the wrist . It is commonly associated with dorsal intercalated segment instability (DISI).
As such, these fractures are managed operatively with internal fixation with or without bone grafting.