Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) popliteal pterygium syndrome ?
    ### Response:
    Popliteal pterygium syndrome is a condition that affects the development of the face, skin, and genitals. Most people with this disorder are born with a cleft lip, a cleft palate (an opening in the roof of the mouth), or both. Affected individuals may have depressions (pits) near the center of the lower lip, which may appear moist due to the presence of salivary and mucous glands in the pits.
    