Sinding Larsen Johansson Lesion

Sinding Larsen Johansson

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.

Cold therapy

Symptoms of Sinding-Larsen-Johansson

  • Symptoms of Sinding Larsen Johansson syndrome will usually affect adolescents
  • Pain at the front of the knee that gets worse during and after exercise
  • The bottom or lower pole of the kneecap may be tender to touch

What is Sinding-Larsen-Johansson syndrome?

Sinding-Larsen-Johansson lesion or syndrome is one of a group of injuries called osteochondroses. They cause knee pain in children. Other similar injuries include:

It usually affects young boys, up to the early teens, following a period of rapid growth. This is because of excess traction on the patella. It is the adolescent equivalent to Jumper’s knee or patella tendinopathy.

Cases of Sinding-Larsen-Johansson usually correct themselves once the skeleton matures.

Alternative diagnoses include:

Osgood Schlatter disease which affects the knee at the point where the patella tendon inserts into the tibia (shin bone).

A bipartite patella which occurs when the patella has a natural split in it and is not the result of a fracture.

Knee braces


  • 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.
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