Volar flexion of lunate relative to long axis of radius and capitate, in neutral position
Disruption of radial carpal ligaments on ulnar side
Associated with triquetrolunate dissociation or triquetral-hamate instability
Radiographs:
Scapholunate angle < 30 degree
Widening of capitate- triquetrum space in radial deviation
Management:
Capitolunate fusion;
Re-enforement of Poirier space
