Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Frontonasal dysplasia ?
    ### Response:
    Frontonasal dysplasia is a very rare disorder that is characterized by abnormalities affecting the head and facial (craniofacial) region. Major physical features may include widely spaced eyes (ocular hypertelorism); a flat, broad nose; and a widow's peak hairline.
    