Osgood Schlatters is a traction apophysitis of the tibial tuberosity caused by excessive pulling of the patella tendon at its insertion. It generally effects boys more than girls, typically around the ages of 10-15 years.
The patella tendon begins as the quadriceps tendon, this runs over the knee cap and inserts into the tibial tuberosity (the bump on your shin bone just under your knee). Similar to severs disease this growth plate doesn’t fuse to the underlying shin bone until about 15 years of age. Increase in activity and excessive pronation can cause the patella tendon excessively pull here, he tibial tuberosity then becomes aggravated, inflamed and painful.
Signs and symptoms of this include local pain, tenderness and swelling, a larger than normal bump at the area of the tibial tuberosity, pain following sports and limping.