T24.72 - Corrosion of third degree of knee T24.7 - Corrosion of third degree of lower limb, except ankle and foot T24.72 - Corrosion of third degree of knee T24.721 - Corrosion of third degree of right knee T24.722 - Corrosion of third degree of left knee T24.729 - Corrosion of third degree of unspecified knee