Fig. 2From: Higher risk of knee arthroplasty during ten-year follow-up if baseline radiographic osteoarthritis involves the patellofemoral joint: a CHECK Cohort StudyParticipant with isolated patellofemoral OA (left panel, baseline) who progressed to combined OA (middle panel shows images at year 8), and finally underwent knee replacement (right panel, year 10)Back to article page