Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to Potocki-Shaffer syndrome ?
    ### Response:
    Potocki-Shaffer syndrome (also known as proximal 11p deletion syndrome) is caused by a deletion of genetic material from the short (p) arm of chromosome 11 at a position designated 11p11.2. The size of the deletion varies among affected individuals. Studies suggest that the full spectrum of features is caused by a deletion of at least 2.
    