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Case no. 13. An osteoarthritic cartilage defect occurred in the medial condyle of the left femur (arrowhead) (a, d). One year after operation, MRI showed that the thickness of the cartilage at the graft site (arrowhead) was almost the same as that of normal cartilage (b, e). At 5.7 years post-implantation, the thickness of the graft site (arrowhead) was maintained, although osteoarthritic change was slightly advanced (c, f)
