Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Carpenter syndrome ?
    ### Response:
    Carpenter syndrome is a condition characterized by the premature fusion of certain skull bones (craniosynostosis), abnormalities of the fingers and toes, and other developmental problems.  Craniosynostosis prevents the skull from growing normally, frequently giving the head a pointed appearance (acrocephaly).
    