Snapshot An obese 47-year-old woman with diabetes presents to her orthopedist reporting left medial knee pain for the past 6 months. She denies any inciting injury or trauma. The pain is worse when she climbs stairs or rises from a seated position. On physical exam, there is tenderness to palpation over the anteromedial proximal tibia. A radiograph reveals no fracture and a follow-up magnetic resonance imaging of the left knee shows fluid accumulation around the pes anserine bursa. Introduction Clinical definition login to view 1 more bullet Associated conditions login to view 2 more bullets Epidemiology Demographics login to view 4 more bullets Location login to view 1 more bullet Risk factors login to view 4 more bullets Etiology Pathogenesis login to view 3 more bullets Tight hamstrings Acute trauma or athletic overuse Degenerative processes Presentation Symptoms login to view 4 more bullets Physical exam login to view 3 more bullets Imaging Radiography login to view 6 more bullets Magnetic resonance imaging login to view 5 more bullets Studies Diagnostic injection with lidocaine or lidocaine-corticosteroids login to view 1 more bullet Making the diagnosis login to view 1 more bullet Differential Tibial stress fracture login to view 2 more bullets Medial meniscus injury login to view 3 more bullets Treatment Conservative login to view 5 more bullets Medical login to view 6 more bullets Complications Persistent pain Prognosis Self-limited and responds well to exercises and stretches Time to resolution varies from weeks to years