Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Galloway-Mowat syndrome ?
    ### Response:
    Galloway-Mowat syndrome is a rare, neurodegenerative disorder characterized by various developmental and physical abnormalities. Signs and symptoms may include small head size (microcephaly); developmental delay; seizures; nephrotic syndrome; hiatal hernia; optic atrophy; movement disorders; and intellectual disability.
    