Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Greig cephalopolysyndactyly syndrome ?
    ### Response:
    Greig cephalopolysyndactyly syndrome is a disorder that affects development of the limbs, head, and face. The features of this syndrome are highly variable, ranging from very mild to severe. People with this condition typically have one or more extra fingers or toes (polydactyly) or an abnormally wide thumb or big toe (hallux).
    