Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) asphyxiating thoracic dystrophy ?
    ### Response:
    Asphyxiating thoracic dystrophy, also known as Jeune syndrome, is an inherited disorder of bone growth characterized by a narrow chest, short ribs, shortened bones in the arms and legs, short stature, and extra fingers and toes (polydactyly). Additional skeletal abnormalities can include unusually shaped collarbones (clavicles) and pelvic bones, and and cone-shaped ends of the long bones in the arms and legs.
    