Sinding Larsen Johansson Syndrome, This is a juvenile Osteochondritis/or traction apophysitis at the inferior (bottom) pole of the patella.
It is an overuse knee injury in children between 7- 15 years of age.
Causes of Sinding Larsen Johansson Syndrome
In adolescents, the skeletal system is immature, a strong repetitive traction pull at the inferior pole of the patella where the patellar ligament attaches results in this condition. As a result, the knee extensor mechanism is disrupted. It is similar to Osgood-Schlatter syndrome. There is a higher incidence of inactive children during the adolescent growth spurt.

Symptoms:
Sinding Larsen Johansson syndrome presents in growing boys and girls as:
• Local pain, swelling, and tenderness over the tibial tuberosity
• Pain is experienced during exercise (e.g. running, jumping) or with direct contacts, such as in kneeling.
• Pain in activities like stair climbing, squatting, and kneeling.
• Quadriceps weakness can be present in chronic cases.
• Maybe or may not be in both knees.
• Symptoms get better with rest.
• A longstanding case of this syndrome can result in an avulsion fracture of the patellar tendon, which can severely affect the ability to walk or run.
Fortunately, the condition can be successfully managed with physiotherapy.

To know more about this read to continue at https://painfreephysiotherapy.com/sinding-larsen-johansson-syndrome/