Your patella is a triangular-shaped bone in the front of your knee that’s also known as your kneecap. About 1 to 2 percent of people have a bipartite patella, which means their patella is made up of ...

Subluxation is another word for partial dislocation of a bone. Patellar subluxation is a partial dislocation of the kneecap (patella). It’s also known as patellar instability or kneecap instability.

Patellar tendonitis — also called jumper’s knee — is a type of knee tendon pain. It happens when the tendons connecting the kneecap to the shinbone become inflamed from overuse. Repetitive motions, ...