Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Acquired Cystic Kidney Disease ?
    ### Response:
    Acquired cystic kidney disease happens when a person's kidneys develop fluid-filled sacs, called cysts, over time. Acquired cystic kidney disease is not the same as polycystic kidney disease (PKD), another disease that causes the kidneys to develop multiple cysts.
    