popliteus tendon tear
The popliteus muscle is often injured in conjunction with other knee injuries. It has 3 origins.
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Arthroscopy is first performed and the popliteus is visualized.
. Popliteus muscle strains and tendinopathies most commonly occur in downhill skiers and in runners and triathletes who compete on hills or uneven surfaces. Popliteus tendon tenosynovitis Abstract This series of case suggests that the entity of tenosynovitis of the popliteus tendon is more common than once recognized. Popliteal tendinitis involves irritation swelling and pain along the length of the tendon that courses lateral around the femoral condyle.
Tears of the popliteus tendon should be characterized as partial or complete intra-articular. The popliteus is the primary internal rotator of the knee while in a non-weight bearing position. Then it passes down and forms a muscle across the back of the knee to insert into the leg bone tibia.
Pain may arise from the muscle belly its tendon or the popliteus-arcuate ligament complex. The proximal insertion of the popliteus muscle is on the proximal side of the tibia proximal of the linea muscli solei. Calcific tendinitis 2.
In contrast popliteus externally rotates the femur on the tibia during load bearing which is often described as unlocking of the knee joint. Popliteus tendinopathy is rare but often misdiagnosed. The complete isolated rupture of the popliteus tendon has been described as a rare injury and this report describes the case of a 31-year-old soccer player who sustained a partial rupture of the popliteus tendon during a game.
Epidemiology Uncommon Risk Factors. It is often seen with downhill running. In this case the tendon is found to have a full-thickness tear with retraction to the popliteal hiatus Fig 1.
The popliteus muscle rotates the thigh outwards and unlocks the knee when running. The unhealthy tissue is gently debrided with a shaver. Acute popliteus tendon tears typically occur in the setting of multi-ligament and meniscal tears and as such careful attention should be paid to the adjacent posterolateral corner structures as well as the cruciate ligaments and menisci 1-3 Figure 7.
Grade 3 This type of grade of popliteus strain involves a complete tear rupture of muscle fibers. The injury was suspected clinically and at MRI but confirmed only by the arthroscopic examination. A Grade 3 popliteus strain is very painful therefore you will tend to experience a burning or stabbing pain a lot of swelling and significant loss of.
Popliteus damage leading to significant incompetence of this structure is generally in the form of an avulsion a tearing off in the region where the tendon attaches to the femur. The popliteus therefore functions to provide both static and dynamic stability to the PLC of the knee joint. MRI demonstrated an ACL injury medial meniscal tear bone bruising and impaction at the lateral femoral condyle and tibial plateau and a tear of the posterior horn of the lateral meniscus that was displaced behind the popliteus.
Popliteus tendinopathies are rare injuries that can occur from overuse trauma or secondary causes such as sesamoid bones or calcifications. Popliteus inflammation manifests itself similarly to IT band friction syndrome except that individuals suffering from popliteus tendinitis describe pain in the proximal portion of the tendon immediately posterior to the LCL. The treatment consisted in open debridment.
Popliteus tendinopathy is a knee injury which typically occurs in combination with other traumatic injuries of the lateral knee especially posterolateral corner structures posterior cruciate ligament PCL and meniscus 1. The popliteus tendon starts outside the knee attaching to the thigh bone femur and the lateral meniscus. A little bit of femur bone is pulled off with the tendon although the tendon itself is not.
Usually where the muscle meets the tendon or where the tendon attaches to the bone. The lateral femoral condyle the fibular head and the lateral meniscus. The popliteofibular ligament popliteomeniscal fascicles attaching to lateral meniscus and its.
The muscle inserts into a triangular area along the posteromedial aspect of the proximal tibial metaphysic above the soleal line. Popliteus Strain andor Tendinopathy Causes. Generally its main action is to rotate the leg.
The popliteus muscle is a small muscle on the posterolateral corner of the knee. A vertical lateral meniscal tear in the red-red zone is also confirmed. They present with nonspecific symptoms and should be.
Popliteus injuries or injuries of the popliteus musculotendinous complex occur within the scope of posterolateral corner injuries of the knee and include avulsions complete and partial tendinous and myotendinous tears as well as muscle injuries. Isolated popliteus pathology is less common. The Popliteus Muscle tendinous unit is unique in that the distal muscular attachment is designated the insertion and the tendinous proximal femoral attachment is designated the origin.
The popliteus tendon is located at the deepest portion of the lateral knee and is intimately associated with other structures which comprise the posterolateral corner. Less commonly the tendinopathy may be secondary to non-traumatic causes eg. The typical cause of injury is a direct blow to the inside of the knee or a sudden forceful overextensionover straightening of the knee.
A high index of sucpicion and accurate palpation of the lateral aspect of the knee lead one to the diagnosis. In the ER the patient complained of medial knee pain and had a significant joint effusion. Actual tears of the substance of the popliteus are less common but do happen and bleeding may occur into the joint.
It presents as posterolateral knee pain that is worse with downhill running and sitting cross-legged. Pain in the back of the knee Tenderness when pressing on. The popliteus is often considered as a popliteus complex referring to its attachments.
Popliteus injuries are commonly seen in combination with injuries to the lateral meniscus and posterior cruciate ligament. For the popliteus muscle some of these main symptoms that may be present in the event of a strain or tear.
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