Sinding - Larsen - Johansson Syndrome

Description: Sinding-Larsen-Johansson syndrome is inflammation of the kneecap (patella) at its lowest point. This is the site of origin of the patellar tendon. There is traction on the kneecap at this point due to action of the large, powerful thigh muscle (quadriceps), as well as with deep bending of the knee. The injury is due to repeated stress or vigorous exercise. It is a temporary condition of the patella that is uncommon after age 16. It is the children’s equivalent of patellar tendinitis (jumper’s knee).