T24.52 - Corrosion of first degree of knee T24.5 - Corrosion of first degree of lower limb, except ankle and foot T24.52 - Corrosion of first degree of knee T24.521 - Corrosion of first degree of right knee T24.522 - Corrosion of first degree of left knee T24.529 - Corrosion of first degree of unspecified knee