Fig. 1

Sagittal intermediate-weighted fat suppressed MRI in treated patient at baseline (a), 3 months (b) and 6 months (c) follow up show improvement of cartilage focal defect of the posterior medial femoral condyle with almost perfect filling at 6 months (long arrows). Also note the grade 1 BML at the central weight-bearing medial femoral condyle disappears at 3 months (a, short arrows). There is a Hoffa-synovitis grade 1 and moderate size tibial osteophytes. There is a femoral intrachondral osteophyte that seems to be slightly increasing in size (dotted arrows)