Below is an instruction from Human. Write a response.
    ### Instruction:
    What is the outlook for Primary CNS Lymphoma ?
    ### Response:
    Certain factors affect prognosis (chance of recovery) and treatment options. The prognosis (chance of recovery) depends on the following:         - The patient's age and general health.     - The level of certain substances in the blood and cerebrospinal fluid (CSF).
    