patellofemoral stress syndrome

runner's knee

an overuse syndrome of anterior knee pain associated with excessive lateral motion of the patella during activity.
A musculoskeletal strain on the knee caused by defective tracking of the patella, causing it to rub against the femur
Mechanics Pronation and lateral strain—resulting in medialisation of the patella and misalignment of the fibrotendinous unit

patellofemoral stress syndrome

Runner's knee, see there.

pa·tel·lo·fem·o·ral syn·drome

(pă-tel'ō-fem'ŏr-ăl sin'drōm)
Degenerative condition affecting the articular cartilage of the patella caused by abnormal compression or shearing forces at the knee joint; may cause patellalgia.
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