Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) multiple pterygium syndrome ?
    ### Response:
    Multiple pterygium syndrome is a condition that is evident before birth with webbing of the skin (pterygium) at the joints and a lack of muscle movement (akinesia) before birth. Akinesia frequently results in muscle weakness and joint deformities called contractures that restrict the movement of joints (arthrogryposis).
    