What is Sinding-Larsen-Johansson Syndrome?

Sinding-Larsen-Johansson syndrome, also known as Sinding-Larsen disease, is a condition that affects adolescents involved in physical activities, particularly sports that involve repetitive jumping and running. It is characterised by inflammation of the patellar tendon, which connects the kneecap (patella) to the shinbone (tibia).

The condition typically presents with pain, swelling, and tenderness at the lower edge of the kneecap where the patellar tendon attaches to the growth plate of the tibia. This area is known as the tibial tuberosity. Sinding-Larsen-Johansson syndrome is considered an overuse injury caused by repetitive stress on the patellar tendon during activities such as running, jumping, or kicking.

Treatment for Sinding-Larsen-Johansson syndrome usually involves rest, activity modification, and physical therapy to strengthen the muscles around the knee and improve flexibility. In severe cases, a brace or splint may be recommended to limit movement and reduce strain on the patellar tendon. Most individuals with this condition recover fully with conservative treatment, although it may take several weeks to months for symptoms to resolve completely. Rarely, surgical intervention may be necessary in cases of persistent pain or significant disruption of the tendon.