Sinding-Larsen-Johansson Lesion or syndrome affects young athletes and children causing pain at the front of the knee, at the lowest point of the patella or kneecap. Symptoms are very similar to Jumper's knee, but the injury is more like Osgood Schlatter disease. Early treatment and in particular rest is important.
It is one of a group of injuries known as osteochondroses which cause knee pain in children. Other similar injuries include Osgood's Schlatter Disease. It is a chronic stress injury to the bottom of the kneecap.
Symptoms of Sinding-Larsen-Johansson
Symptoms of Sinding-Larsen-Johansson syndrome will usually effect adolescents and include pain at the front of the knee which gets worse during and after exercise. The bottom or lower pole of the kneecap may be tender to touch.
Sinding-Larsen-Johansson Syndrome explained
Sinding-Larsen-Johansson lesion or syndrome usually affects young boys, up to the early teens. It is caused by a combination of excessive traction on the patella from the patella tendon and usually a period of rapid growth.
This condition is described as the adolescent equivalent to Jumper's knee or patella tendinopathy. Other alternative diagnoses include Osgood Schlatter disease and a bipartite patella. Osgood Schlatters disease affects the knee at the point where the patella tendon inserts into the tibia bone on a prominent protrusion which is known as the tibial tuberosity rather than at the bottom of the patella in the case of Sinding Larsen Johansson. A bipartite patella occurs when the patella has a natural split in it and is not the result of a fracture.
Cases of Sinding-Larsen-Johansson usually correct themselves once the skeleton matures.
Relative rest from aggravating activities. Cold therapy will help to ease pain and inflammation. Gentle quad stretching exercises can be done provided they are pain-free. Quad strengthening when pain allows is important to the muscle and tendon unit can cope with the loads that are required for the sport. A knee support or patella tendon strap may help support the joint and relieve some of the load on the patella tendon.