Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Polycystic liver disease ?
    ### Response:
    Polycystic liver disease is an inherited condition characterized by many cysts of various sizes scattered throughout the liver. Abdominal discomfort from swelling of the liver may occur; however, most affected individuals do not have any symptoms. In some cases, polycystic liver disease appears to occur randomly, with no apparent cause.
    