Snapshot A 25-year-old woman twisted and injured her right knee during a soccer game 4 weeks ago. At that time, there was moderate knee swelling which has since resolved. She reports intermittent medial right knee pain and a sensation of the joint giving way since then. Her symptoms are aggravated by twisting or squatting. On physical exam, there is a mild effusion, medial joint line tenderness, and a positive medial McMurray test. Valgus stress reveals no pain or joint opening. Anterior and posterior drawer test is negative. Introduction Clinical definition login to view 7 more bullets Associated conditions login to view 1 more bullet Epidemiology Demographics login to view 5 more bullets Location login to view 1 more bullet Risk factors login to view 7 more bullets ETIOLOGY Pathogenesis login to view 5 more bullets Presentation Symptoms login to view 5 more bullets Physical exam login to view 18 more bullets Imaging Radiograph login to view 5 more bullets Magnetic resonance imaging login to view 4 more bullets Studies Making the diagnosis login to view 1 more bullet Differential Anterior or posterior cruciate ligament injury login to view 2 more bullets Osteoarthritis of the knee login to view 3 more bullets Treatment Management approach login to view 1 more bullet Conservative login to view 10 more bullets Medical login to view 3 more bullets Operative login to view 7 more bullets Complications Fibrosis Septic arthritis