Fig. 1From: Human osteochondritis dissecans fragment-derived chondrocyte characteristics ex vivo, after monolayer expansion-induced de-differentiation, and after re-differentiation in alginate bead cultureArthroscopic images of an osteochondritis dissecans (OCD) lesion ICRS grade 4 of the medial femoral condyle in a 24Â year old male patient. a Gives the initial finding at arthroscopy. b Illustrates the lesion after debridement and the insert shows a representative image of an dislocated and arthroscopically removed OCD fragmentBack to article page