Sinding-Larsen-Johansson Disease

Sinding-Larsen-Johansson disease is a type of osteochondrosis affecting the attachment of the patellar tendon to the patella and characterised by tenderness and localized swelling of the patella.

Epidemiology

Prevalence is unknown.

Clinical description

This disease occurs mostly in adolescents, especially in young male athletes practising sport. Bone fragmentation of the inferior portion of the patella may occur.

Etiology

It results from contusion or traction tendinitis of the proximal attachment of the patella tendon, followed by de novo calcification.

Prognosis

The course of the disease is usually self-limited and benign.