Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) thanatophoric dysplasia ?
    ### Response:
    Thanatophoric dysplasia is a severe skeletal disorder characterized by extremely short limbs and folds of extra (redundant) skin on the arms and legs. Other features of this condition include a narrow chest, short ribs, underdeveloped lungs, and an enlarged head with a large forehead and prominent, wide-spaced eyes.
    