Excessive pull by a large tendon causes damage to the unfused apophysis to which it is attached
Osgood-Schaltter's disease
- Traction apophysities at tibial tubercle - insertion of patellar tendon into tibial tuberosity
- Occurs in adolescent active boys
Clinical presentation
- Knee pain, swelling
- Leaves prominent bony lump
Other sites
- Can also happen at patella and Achilles