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Patellar tendinitis, also known as jumper's knee, is an overuse injury of the tendon that straightens the knee. [1] Symptoms include pain in the front of the knee. [1] Typically the pain and tenderness is at the lower part of the kneecap, though the upper part may also be affected. [2] Generally there is no pain when the person is at rest. [2]
The patellar tendon is a strong, flat ligament, which originates on the apex of the patella distally and adjoining margins of the patella and the rough depression on its posterior surface; below, it inserts on the tuberosity of the tibia; its superficial fibers are continuous over the front of the patella with those of the tendon of the quadriceps femoris.
Risk factors include patellar tendinitis, kidney failure, diabetes, and steroid or fluoroquinolone use. [1] [2] There are two main types of ruptures: partial and complete. [1] In most cases, the patellar tendon tears at the point where it attaches to the knee cap. [1] Diagnosis is based on symptoms, examination, and medical imaging. [1]
Tendinopathy is a type of tendon disorder that results in pain, swelling, and impaired function. [2] The pain is typically worse with movement. [2] It most commonly occurs around the shoulder (rotator cuff tendinitis, biceps tendinitis), elbow (tennis elbow, golfer's elbow), wrist, hip, knee (jumper's knee, popliteus tendinopathy), or ankle (Achilles tendinitis).
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Patellar overload syndrome, runner's knee, [1] retropatellar pain syndrome [1] Diagram of the bones of the lower extremity. Rough distribution of areas affected by PFPS highlighted in red: patella and distal femur. Specialty: Orthopedics, sports medicine: Symptoms: Pain in the front of the knee [1] Usual onset: Gradual [2] Causes: Unclear [1 ...
Patella, its tendon and tibial tuberosity. The condition is usually seen in athletic individuals typically between 10 and 14 years of age. Following a strain or partial rupture of patellar ligament the patient develops a traction ‘tendinitis’ characterized by pain and point tenderness at the inferior (lower) pole of the patella associated with focal swelling.
When the deep bursa is involved, bending the knee generally increases the pain. [2] Other conditions that may appear similar include patellar tendonitis and prepatellar bursitis. [5] Treatment is generally by rest, alternating between ice and heat, and NSAIDs. [1] Infrapatellar bursitis is relatively rare. [4]