Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) McCune-Albright syndrome ?
    ### Response:
    McCune-Albright syndrome is a disorder that affects the bones, skin, and several hormone-producing (endocrine) tissues.  People with McCune-Albright syndrome develop areas of abnormal scar-like (fibrous) tissue in their bones, a condition called polyostotic fibrous dysplasia.
    