Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Multiple epiphyseal dysplasia ?
    ### Response:
    Multiple epiphyseal dysplasia (MED) is a group of disorders of cartilage and bone development, primarily affecting the ends of the long bones in the arms and legs (epiphyses). There are two types of MED, which are distinguished by their patterns of inheritance - autosomal dominant and autosomal recessive.
    