Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) von Hippel-Lindau syndrome ?
    ### Response:
    Von Hippel-Lindau syndrome is an inherited disorder characterized by the formation of tumors and fluid-filled sacs (cysts) in many different parts of the body. Tumors may be either noncancerous or cancerous and most frequently appear during young adulthood; however, the signs and symptoms of von Hippel-Lindau syndrome can occur throughout life.
    