Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Glass-Chapman-Hockley syndrome ?
    ### Response:
    The Glass-Chapman-Hockley syndrome is a very rare disease. To date, the syndrome has only been reported in one family with five members affected in three generations. The first patients were two brothers that had an abnormally-shaped head due to coronal craniosynostosis.
    