Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Ewing's family of tumors ?
    ### Response:
    What causes Askins tumor? In 80% to 90% of Askins tumors, a part of chromosome 11 and chromosome 22 are translocated. 'Translocation' means that the chromosomes have exchanged material. This exchange of material interrupts the cell's ability to grow and divide normally.
    