Below is an instruction from Human. Write a response.
    ### Instruction:
    what research (or clinical trials) is being done for Brain and Spinal Tumors ?
    ### Response:
    Scientists continue to investigate ways to better understand, diagnose, and treat CNS tumors. Experimental treatment options may include new drugs, gene therapy, surgery , radiation, biologic modulators that enhance the body's overall immune system to recognize and fight cancer cells, and a combination of therapies.
    