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Subchondral plate abnormalities: (A) A 36-year-old woman with a talar osteochondral defect (OCD) lesion 3.4 years after autologous chondrocyte implantation (ACI) surgery demonstrating focal defects in the subchondral plate. (B) A 40-year-old man with a talar OCD lesion 4.6 years after ACI surgery demonstrating slight depression in the subchondral plate. (C) A 36-year-old man with a talar OCD lesion 4.3 years after ACI surgery demonstrating no defects of the subchondral plate.
