Stage 1 consists of small fracture lines. Stage 2 is rarification along the fracture line, usually on the volar pole. Stage 3 shows sclerosis of the bone dorsal to the fracture site. Stage 4 shows sclerosis of the bone dorsal to the fracture site, and collapse and secondary fracture with loss of architectural integrity of the lunate. Stage 5 shows secondary arthritic changes of the radius.
Treatment is categorized into two general types.
The first is an attempt to allow revascularization of the lunate by relieving the compression forces. These procedures are performed in the early stages of Kienbock's disease.