- Clinical science
Osgood-Schlatter disease is an avascular necrosis thought to arise from overuse of the quadriceps muscle during periods of growth. This causes a traction apophysitis at the tibial insertion of the quadriceps tendon. The most common symptom is anterior knee pain that worsens with exercise. A tibial bump may be felt and can often be seen on x-ray. Treatment is usually conservative. Surgical excision is only necessary in severe and treatment-resistant cases.
- Age: adolescents; on average 9–14 years old
- Sex: ♂ > ♀ (3:1)
Epidemiological data refers to the US, unless otherwise specified.
- Overuse (especially sports involving sprinting and jumping) during the ossification period (adolescence) → excessive strain of the patellar ligament on the tibial tuberosity → inflammation → traction apophysitis
- Chronic inflammation of the patella ligament can disrupt the secondary ossification of the tibial tuberosity → detachment of the apophysis possible → subsequent callous formation during the healing process results in a pronounced tibial tubercle
- Anterior soft tissue swelling
- Lifting of tubercle from the shaft
- Irregularity or fragmentation of the tubercle
- Ultrasound: soft tissue swelling