Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Parkes Weber syndrome ?
    ### Response:
    What are the signs and symptoms of Parkes Weber syndrome? Parkes Weber syndrome is characterized by birthmarks caused by capillary malformations on the skin; hypertrophy (excessive growth) of the bone and soft tissue of the affected limb (which may lead to a difference in size between the affected and non-affected limb); and multiple arteriovenous fistulas (abnormal connections between arteries and veins).
    