Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Kienbock's disease ?
    ### Response:
    Kienbock's disease is a condition characterized by interruption of blood supply to one of the small bones of the hand near the wrist (the lunate). If blood supply to a bone stops, the bone can die; this is known as osteonecrosis. Affected people may first think they have a sprained wrist and may have experienced trauma to the wrist, which can disrupt the blood flow to the lunate.
    