Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the stages of Chronic Myeloproliferative Neoplasms ?
    ### Response:
    Key Points
                    - There is no standard staging system for chronic myeloproliferative neoplasms.
                
                
                    There is no standard staging system for chronic myeloproliferative neoplasms.
                    Staging is the process used to find out how far the cancer has spread.
    