你的情况应该及早去大医院专科治疗, best ranking for orthopedics: Hospital for special surgery in NY, Mayo in MN, Cleveland in OH, hospital for join diseases in NY, MGH (mass general hospital). YOurs seems severe now. Look at the following link: [url=http://thesteadmanclinic.com/knee_chondral/overview.asp]http://thesteadmanclinic.com/knee_chondral/overview.asp[/url]