A patella fracture is a break of the kneecap. Patellar Lunation, also known as luxating patella, refers to the dislocation of the kneecap. The underlying mechanism involves small tears in the tendon connecting the kneecap with the shinbone. Shin guards also protect the kneecap. If pushing the kneecap into the femur increases the pain, the diagnosis is more likely. The kneecap is the largest sesamoid bone in the body. Symptoms may include knee pain, swelling, and redness just below the kneecap. The primary symptom of prepatellar bursitis is swelling of the area around the kneecap. He suffered a fractured kneecap, ruling him out for several months. Linebacker Danny Trevathan was sidelined with injuries to his left kneecap on three different occasions. A review of eighty kneecapping victims found that only two had a fractured kneecap. King has been hit on the leg, the bullet smashing his kneecap. This is painful and usually needs to be treated by surgery to realign the kneecap. I looked down, and my kneecap was hanging on the side of my leg. At 12, a twice-broken kneecap derailed her gymnastics dreams and pushed her towards golf.