Transradial styloid transscaphoid perilunate fracture-dislocation

Description: Transradial styloid perilunate fracture-dislocation represents greater arc (Gilula's arcs) injury.
Greater arc injuries may be divided into following stages based on their severity:
Stage I: transradial styloid perilunate fracture-dislocation;
Stage II: transscaphoid perilunate fracture-dislocation;
Stage III: transscaphoid, transcapitate perilunate fracture-dislocation;
Stage IV: transscaphoid (or radial styloid), transcapitate, transtriquetral perilunate fracture-dislocation; and
Stage V: complete palmar lunate dislocation associated with carpal fractures.