Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) 9q22.3 microdeletion ?
    ### Response:
    9q22.3 microdeletion is a chromosomal change in which a small piece of chromosome 9 is deleted in each cell. The deletion occurs on the long (q) arm of the chromosome in a region designated q22.3. This chromosomal change is associated with delayed development, intellectual disability, certain physical abnormalities, and the characteristic features of a genetic condition called Gorlin syndrome.
    