Etienne A. Mejia, M.D.

Dr. Etienne A. Mejia is a board certified orthopedic surgeon with subspecialty fellowship training in arthroscopy, athletic injuries, sports medicine and rehabilitation.

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Dan R. Kraeger, D.O.

Dr. Dan R. Kraeger specializes in the non-operative treatment and rehabilitation of muscle and joint injuries, as well as back pain.

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Meet Our Doctors

What Causes Knee (Patellofemoral) Pain?

December 22, 2020

Etienne (“E.T.”) Mejia, MD Knee pain is one of the most common conditions prompting patients to present to my office. Although there are many causes of knee pain, many people have pain around the front of the knee, or what we call “patellofemoral pain.” The patella is the kneecap. It is a focal area of the extensor mechanism of the knee where many vital structures attach, such as the thigh muscles (the quads), patellar tendon, and the supporting shrouds on either side (retinacula), which function as checkreins to keep the patella centered. The patella glides on a groove on the femur, also known as the “thigh bone.” The patella provides the surrounding muscles a significant mechanical advantage to straighten the knee from a bent position, but also to prevent the knee from collapsing and folding over when weight is applied. It allows us to jump, land, squat, climb and descend stairs. It requires tremendous coordination with hip and ankle muscles for it to work in a chain effect in the lower extremity. Any deviation from the fine coordination in the lower extremity chain can lead to patellofemoral pain. Patients with Knee Pain

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