Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Aicardi-Goutieres syndrome ?
    ### Response:
    Aicardi-Goutieres syndrome is a disorder that mainly affects the brain, the immune system, and the skin.  Most newborns with Aicardi-Goutieres syndrome do not show any signs or symptoms of the disorder at birth. However, about 20 percent are born with a combination of features that include an enlarged liver and spleen (hepatosplenomegaly), elevated blood levels of liver enzymes, a decrease in blood platelets (thrombocytopenia), and abnormal neurological responses.
    