Radiographic classification First described by David Lichtman et al. in 1977. The purpose of this classification system is to guide treatment and to enable comparison of clinical outcomes. # Stage I Normal radiograph (possible lunate fracture). # Stage II Sclerosis of the lunate without collapse. (Portions of the lunate begin to deteriorate. This shows as a white blemish on x-rays.) # Stage IIIA Lunate collapse and fragmentation, in addition to proximal migration of the capitate. # Stage IIIB Lunate collapse and fragmentation, in addition to proximal migration of the capitate. In addition there is fixed flexion deformity of the scaphoid. # Stage IV Changes up to and including fragmentation, with radiocarpal and midcarpal arthritic changes.
Kienböck's disease
Tornwaldt's disease
Pogosta disease
Dieterich's disease
Ontario Minamata disease
Kimura's disease
Brill–Zinsser disease
Urbach–Wiethe disease