Kienbock's disease has four distinct stages; it's important for doctors to distinguish between the different stages because of the differences in treatment.
Stage 1 - this stage may be when you think you have sprained your wrist. It's painful, maybe a bit swollen
Stage 2 - if the bones were examined by x-ray, you would be able to see where the bone tissue is dying. The wrist may be more painful, swollen, and tender
Stage 3 - the bone may begin to break apart, causing more pain and making it difficult to move the wrist
Stage 4 - the adjoining bones are affected
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