Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Subacute cerebellar degeneration ?
    ### Response:
    What causes subacute cerebellar degeneration? Subacute cerebellar degeneration may occur when the body's immune system attacks healthy tissue, either for unknown reasons or as an abnormal reaction to an underlying cancer. These cases are referred to as paraneoplastic cerebellar degeneration.
    