Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Meningoencephalocele ?
    ### Response:
    Meningoencephalocele is a type of encephalocele, which is an abnormal sac of fluid, brain tissue, and meninges (membranes that cover the brain and spinal cord) that extends through a defect in the skull.  There are two main types of meningoencephalocele, which are named according to the location of the sac.
    