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  2. Meniscus tear - Wikipedia

    en.wikipedia.org/wiki/Meniscus_tear

    The common signs and symptoms of a torn meniscus are knee pain, particularly along the joint line, and swelling. These are worse when the knee bears more weight (for example, when running). Another typical complaint is joint locking, when the affected person is unable to straighten the leg fully. This can be accompanied by a clicking feeling.

  3. Radiographic classification of osteoarthritis - Wikipedia

    en.wikipedia.org/wiki/Radiographic...

    For the grading of osteoarthritis in the knee, the International Knee Documentation Committee (IKDC) system is regarded to have the most favorable combination of interobserver precision and correlation to knee arthroscopy findings. [10] It was formed by a group of knee surgeons from Europe and America who met in 1987 to develop a standard form ...

  4. Spontaneous osteonecrosis of the knee - Wikipedia

    en.wikipedia.org/wiki/Spontaneous_osteonecrosis...

    Localised tenderness over the medial knee is the most common finding of the condition. It is usually happening on one side, without a previous history of trauma. SONK should be considered together with differential diagnosis of osteoarthritis , tear of medial meniscus , and tibial plateau fracture .

  5. Patellar tendon rupture - Wikipedia

    en.wikipedia.org/wiki/Patellar_tendon_rupture

    Often there is sudden onset of pain and walking is difficult. [1] In a complete rupture, the ability to extend that knee is decreased. [1] A pop may be felt when it occurs. [2] Injury to the patellar tendon generally requires a significant force such as falling directly on the knee or jumping from a height. [1]

  6. Patellofemoral pain syndrome - Wikipedia

    en.wikipedia.org/wiki/Patellofemoral_pain_syndrome

    Patellofemoral pain syndrome (PFPS; not to be confused with jumper's knee) is knee pain as a result of problems between the kneecap and the femur. [4] The pain is generally in the front of the knee and comes on gradually. [2] [4] Pain may worsen with sitting down with a bent knee for long periods of time, excessive use, or climbing and ...

  7. Iliotibial band syndrome - Wikipedia

    en.wikipedia.org/wiki/Iliotibial_band_syndrome

    Iliotibial band syndrome (ITBS) is the second most common knee injury, and is caused by inflammation located on the lateral aspect of the knee due to friction between the iliotibial band and the lateral epicondyle of the femur. [2] Pain is felt most commonly on the lateral aspect of the knee and is most intensive at 30 degrees of knee flexion. [2]

  8. Unhappy triad - Wikipedia

    en.wikipedia.org/wiki/Unhappy_triad

    Anterior cruciate ligament tear seen on MRI. An anterior cruciate ligament injury results from excess tension on the ligament. This can come from a sudden stop or twisting motion of the knee. A few initial symptoms include swelling, knee instability, and pain. A popping sound or sensation may or may not be heard when the ACL first tears.

  9. Ottawa knee rules - Wikipedia

    en.wikipedia.org/wiki/Ottawa_knee_rules

    The Ottawa knee rules are a set of rules used to help physicians determine whether an x-ray of the knee is needed. [1] They state that an X-ray is required only in patients who have an acute knee injury with one or more of the following: Age 55 years or older; Tenderness at head of fibula; Isolated tenderness of patella