Patellar tendinosis is a common overuse sports injury that is associated with pain at the attachment of the quadriceps tendon to the superior pole of the patella, the distal insertion of the extensor mechanism to the tibial tuberosity, or the proximal attachment of the patellar tendon to the inferior pole of the patella. Also known as jumper's knee, it is related to activities that require repetitive,forceful contractions of the quadriceps muscles, such as jumping. An athletic career may be severely limited or terminated as a result of progressive tendon degeneration. Patellar tendinosis may result from a combination of both extrinsic and intrinsic factors.
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