Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Pallister-Hall syndrome ?
    ### Response:
    Pallister-Hall syndrome is a disorder that affects the development of many parts of the body. Most people with this condition have extra fingers and/or toes (polydactyly), and the skin between some fingers or toes may be fused (cutaneous syndactyly). An abnormal growth in the brain called a hypothalamic hamartoma is characteristic of this disorder.
    