Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Sacrococcygeal Teratoma ?
    ### Response:
    A sacrococcygeal teratoma is a tumor that grows at the base of the spine in a developing fetus.  It occurs in one in 40,000 newborns and girls are four times more likely to be affected than boys.  Though it is usually benign, there is a possibility that the teratoma could become malignant.
    