Repair of a large patellar cartilage defect using human umbilical cord blood-derived mesenchymal stem cells: A case report

Figure 1 Magnetic resonance images. A: T2-weighted, a fat-suppressed axial image showing a cartilage defect (arrow) on the medial side of the patella and patellar dislocation with a medial patellofemoral ligament tear; B: T2-weighted, a fat-suppressed sagittal image showing a large amount of hemarthrosis and detached patellar cartilage (arrow) in the infrapatellar area; C: Proton density axial image showing regeneration of the patellar cartilage (arrow) and a normal patellar position, with the healing of the medial patellofemoral ligament, 18 mo after surgery; D: Proton fat-suppressed sagittal image showing patellar cartilage regeneration (arrow) 18 mo after surgery.