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Fig. 9A —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. Sagittal proton
density-weighted fast spin-echo image (TR/TE, 2,900/38; echo-train length, 8)
of knee from IV (indirect) MR arthrogram shows prominent periosteal
hypertrophy. Surface of ACI site (arrowheads) is above level of
native articular cartilage, best seen at junction between ACI and native
cartilage (arrow).
