Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) ankyloblepharon-ectodermal defects-cleft lip/palate syndrome ?
    ### Response:
    Ankyloblepharon-ectodermal defects-cleft lip/palate (AEC) syndrome is a form of ectodermal dysplasia, a group of about 150 conditions characterized by abnormal development of ectodermal tissues including the skin, hair, nails, teeth, and sweat glands.  Among the most common features of AEC syndrome are missing patches of skin (erosions).
    