Runner's knee may refer to a number of overuse injuries involving pain around the kneecap (patella), such as:
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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. The pain is generally in the front of the knee and comes on gradually. Pain may worsen with sitti ...
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Chondromalacia patellae
Chondromalacia patellae (also known as CMP) is an inflammation of the underside of the patella and softening of the cartilage.
The cartilage under the kneecap is a natural shock absorber, and overuse, injury, and many other factors can cause inc ...
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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. Pain is felt most ...
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Plica syndrome
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Knee injuries and disorders