Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to neurohypophyseal diabetes insipidus ?
    ### Response:
    The familial form of neurohypophyseal diabetes insipidus is caused by mutations in the AVP gene. This gene provides instructions for making a hormone called vasopressin or antidiuretic hormone (ADH). This hormone, which is produced and stored in the brain, helps control the body's water balance.
    