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Features consistent with moderate osteoarthritis of bilateral knees (Kellgren and Lawrence grade III). This is demonstrated by significant medial joint space narrowing, tibial spine irregularity, subchondral sclerosis with minimal femorotibial and patellofemoral spurring. This suggests bicompartmental osteoarthritis. There is no reactive bursitis. There are no occult bone lesions. There is incidental curvilinear calcification within the popliteal fossa bilaterally.