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Patient with unilateral knee osteoarthritis

Patient with unilateral knee osteoarthritis
Unilateral knee OA: swollen left knee with varus and fixed flexion deformity in a 63-year-old man with a prior history of knee trauma. On palpation, there was marked crepitus, restricted flexion, bony swelling, and a small effusion. The cruciates were intact, but there was minor varus/valgus instability on stress testing.
OA: osteoarthritis.
Reproduced with permission from: OARSI Online Primer. Edited by Henrotin Y, Hunter D, Kawaguchi H. 2012. Osteoarthritis Research Society International. (http://primer.oarsi.org).
Graphic 105821 Version 2.0