Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Meningoencephalocele ?
    ### Response:
    What causes meningoencephalocele? The exact cause of meningoencephalocele is not known. Some studies have suggested that environmental factors could play a role in causing the condition. Exposure during pregnancy to aflatoxins, toxins produced by a mold that grows in nuts, seeds, and legumes, has been proposed to be a possible cause in some cases.
    