Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) hypochondroplasia ?
    ### Response:
    Hypochondroplasia is a form of short-limbed dwarfism. This condition affects the conversion of cartilage into bone (a process called ossification), particularly in the long bones of the arms and legs. Hypochondroplasia is similar to another skeletal disorder called achondroplasia, but the features tend to be milder.
    