Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Isodicentric chromosome 15 syndrome ?
    ### Response:
    Isodicentric chromosome 15 syndrome is a chromosome abnormality that affects many different parts of the body. As the name suggests, people with this condition have an extra chromosome (called an isodicentric chromosome 15) which is made of two pieces of chromosome 15 that are stuck together end-to-end.
    