Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Hutchinson-Gilford progeria syndrome ?
    ### Response:
    Hutchinson-Gilford progeria syndrome is a genetic condition characterized by the dramatic, rapid appearance of aging beginning in childhood. Affected children typically look normal at birth and in early infancy, but then grow more slowly than other children and do not gain weight at the expected rate (failure to thrive).
    