Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Ollier disease ?
    ### Response:
    Ollier disease is a skeletal disorder characterized by an asymmetric distribution of cartilagenous tumors (endochondromas) which may lead to skeletal deformities and limb-length discrepancy.[3] This condition primarily affects the long bones and cartilage of the joints of the arms and legs, specifically the area where the shaft and head of a long bone meet (metaphyses).
    