This patient probably has neurofibromatosis.I would protect the leg with an orthosis to try to prevent fracture.Follow him along,may also be fibrous dysplasia.

• （大夫郑重提醒：因不能面诊患者，无法全面了解病情，以上建议仅供参考，具体诊疗请一定到医院在医生指导下进行！）