Inclusion criteria were Kellgren grade 0–II, osteoarthritis confirmed by a baseline MRI (some patients also having other intra-articular pathology), with knee pain in patients aged 30 to 70 years.

Twenty-two patients were treated with platelet-rich plasma for early osteoarthritis, confirmed with a baseline MRI. Inclusion criteria were Kellgren grade 0–II with knee pain in patients aged 30 ...