Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Paget's Disease of Bone ?
    ### Response:
    Paget's disease is almost always diagnosed by x-ray, although it may be discovered using one of two other tests: an alkaline phosphatase blood test or a bone scan. Paget's disease is often found by accident when a person undergoes one of these tests for another reason.
    