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contentuptodate· Content· item f6_21_6491
©2013 UpToDate ® Print Email Causes of acute hemarthrosis of the knee Injury Anterior cruciate ligament tear 70-72 percent Patellar subluxation or dislocation 10-15 percent Peripheral meniscal tear 10 percent Osteochondral fracture 2-5 percent Posterior cruciate tear, capsular tear, other 5 percent Modified with permission from Baker, C. Journal of MAG 1992; 81:301.