Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) mandibulofacial dysostosis with microcephaly ?
    ### Response:
    Mandibulofacial dysostosis with microcephaly (MFDM) is a disorder that causes abnormalities of the head and face. People with this disorder often have an unusually small head at birth, and the head does not grow at the same rate as the rest of the body, so it appears that the head is getting smaller as the body grows (progressive microcephaly).
    