Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Sturge-Weber Syndrome ?
    ### Response:
    Sturge-Weber syndrome is a neurological disorder indicated at birth by a port-wine stain birthmark on the forehead and upper eyelid of one side of the face. The birthmark can vary in color from light pink to deep purple and is caused by an overabundance of capillaries around the trigeminal nerve just beneath the surface of the face.
    