5. No single finding is diagnostic of knee OA.
6. MRI findings indicative of knee OA may include abnormalities in all tissues of the joint (bone, cartilage, meniscus, synovium, ligament, and capsule).
7. Given the multiple tissue abnormalities detected by MRI in OA, diagnostic criteria are likely to involve combinations of features.
8. Definite osteophyte production is indicative of OA.
9. Joint space narrowing as assessed by MRI cannot be used as a diagnostic criterion.