Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) diastrophic dysplasia ?
    ### Response:
    Diastrophic dysplasia is a disorder of cartilage and bone development. Affected individuals have short stature with very short arms and legs. Most also have early-onset joint pain (osteoarthritis) and joint deformities called contractures, which restrict movement.
    