Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Mosaic trisomy 8 ?
    ### Response:
    Mosaic trisomy 8 is a chromosome disorder defined by the presence of three copies of chromosome 8 in some cells of the body. It is characterized by distinctive facial features; mild intellectual disability; and joint, kidney, cardiac, and skeletal abnormalities.
    