Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Myelodysplastic Syndromes ?
    ### Response:
    Key Points
                    - Myelodysplastic syndromes are a group of cancers in which immature blood cells in the bone marrow do not mature or become healthy blood cells.     - The different types of myelodysplastic syndromes are diagnosed based on certain changes in the blood cells and bone marrow.
    