Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) autosomal recessive primary microcephaly ?
    ### Response:
    Autosomal recessive primary microcephaly (often shortened to MCPH, which stands for "microcephaly primary hereditary") is a condition in which infants are born with a very small head and a small brain. The term "microcephaly" comes from the Greek words for "small head.
    