Understanding Popliteus Tendinopathy Popliteus Tendinopathy, sometimes referred to as popliteal tendonitis or tenosynovitis, is a rare and poorly described cause of knee pain.
Understanding Popliteus Tendinopathy Popliteus Tendinopathy, sometimes referred to as popliteal tendonitis or tenosynovitis, is a rare and poorly described cause of knee pain. It was first described by Barnes in 1995. Politeus tendon anatomy. Case Vignette You are evaluating a 49 year old male in your clinic who recently underwent a total knee arthroplasty out of state.
He has pain in his postoperative knee in the posterolateral space. Garrick test is positive and you suspect popliteal tendinopathy. Which of the following correctly describes the Garrick Test?
A) Patient seated, hip and knee flexed to 90°, active external rotation B) Patient seated, hip and knee flexed to 45°, active Internal rotation C) Patient standing, hip and knee flexed to 90°, active external rotation D) Patient seated, hip and knee flexed to 90°, active Internal rotation The popliteus muscle ‘unlocks’ the knee joint and stabilizes the knee. In an open chain, popliteus serves to internally rotate the tibia concentrically on the femur, and in closed chain, acts eccentrically during external rotation of the femur on the tibia. It originates on the lateral condyle of the femur, with some fibers extending into the lateral meniscus and inserts on the posteromedial surface of the tibia.
Total knee replacement (left) and postoperative ultrasound (right). This longitudinal view shows an echogenic osteophyte (red arrow) impinging on the popliteus tendon (white arrow). "Ultrasound diagnosis of osteophytic impingement of the popliteus tendon after total knee replacement." Journal of Ultrasound in Medicine 37.9: 2279-2283.[/ref].
If you are experiencing symptoms that may be related to popliteus tendinopathy: a poorly understood cause of knee pain, it is important to see a sports medicine physician. Early evaluation and treatment typically lead to better outcomes. Do not ignore pain or symptoms that are limiting your activity.
*This article is for educational purposes only and does not substitute for professional medical advice. Always consult a qualified healthcare provider.*
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