Patellar tendinopathy is a disorder of the patellar tendon

The condition used to be called patellar 'tendinitis' or 'tendonitis'. The term '-itis' in medicine means 'inflammation' - a process of irritation, increased blood supply, and infiltration of the area with special inflammatory cells - but these features are not actually seen in patellar tendinitis. So there is a lot of medical literature suggesting that the condition no longer be called 'patellar tendinitis' but 'patellar tendinopathy' or 'patellar tendinosis' instead, implying a degenerative condition rather than an inflammatory one. For your research, you need to search using all of these keywords.

In this disorder the tendon develops a mushy ('mucoid') degeneration, which weakens it, causes local discomfort, and may predispose the tendon to rupture.

Synonyms: 
Jumper's knee
Patellar tendinitis
Patellar tendinosis
-

A discussion about the role of shockwave therapy for refractory patellar tendinopathy.

Image of Cho-Pat Dual Action Knee Strap – Provides Full Mobility & Pain Relief For Weakened Knees – Black (Medium, 14”-16”)

The Cho Pat Dual Action Knee Strap applies pressure over the patellar tendon and the quadricps tendon, improving the biomechanics and helping to alleviate pain arising from the ...

The KneedIT tendon strap offers support to the patellar tendon and also has two magnets to aid in reducing...

Overuse syndromes affecting the patella

Repetitive activities can stress anatomical structures and lead to 'overuse' symptoms.

-

CLINICAL PUBLICATIONS

Current concepts in the treatment of patellar tendinopathy. Reinking MF. Int J Sports Phys Ther. 2016 Dec; 11(6): 854–866.