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Fig. 9C 22-year-old woman with catching sensation in knee 6 months
after autologous chondrocyte implantation (ACI) surgery for 24-mm-long x
19-mm-wide osteochondral defect of medial femoral condyle. Image of ACI site
from knee arthroscopic surgery performed 19 days after A shows
prominent mound of fibrous, periosteal overgrowth (arrow) and
junction between ACI and native articular cartilage (arrowheads).
Fibrous periosteal tissue was débrided, revealing firm, intact repair
tissue underneath.