Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) megalencephaly-capillary malformation syndrome ?
    ### Response:
    Megalencephaly-capillary malformation syndrome (MCAP) is a disorder characterized by overgrowth of several tissues in the body. Its primary features are a large brain (megalencephaly) and abnormalities of small blood vessels in the skin called capillaries (capillary malformations).
    