Table 3.

Stahl–Lichtman classification of Kienböck’s disease

Stage I—lunate normal on plain film, MRI positive

Stage II—lunate sclerosis on plain film, no collapse

Stage III—lunate collapse with (a) normal proximal row alignment/carpal stability or (b) abnormal proximal row alignment/carpal instability

Stage IV—degenerative changes in the radiocarpal and/or midcarpal joint, fixed scaphoid rotation