Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Atypical Chronic Myelogenous Leukemia ?
    ### Response:
    Key Points
                    - Atypical chronic myelogenous leukemia is a disease in which too many granulocytes (immature white blood cells) are made in the bone marrow.    - Signs and symptoms of atypical chronic myelogenous leukemia include easy bruising or bleeding and feeling tired and weak.
    