Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the stages of Adult Acute Lymphoblastic Leukemia ?
    ### Response:
    Key Points
                    - Once adult ALL has been diagnosed, tests are done to find out if the cancer has spread to the central nervous system (brain and spinal cord) or to other parts of the body.    - There is no standard staging system for adult ALL.
    