Osgood Schlatter's disease is an 'overuse' condition, where the attachment of the patellar tendon to the tibia bone becomes stressed.

osgood  schlatter's - traction on the apophysis
The patient is usually a young active person, who may become very distressed by pain at the tibial tuberosity when engaging in jumping sports.
osgood schlatter's disorder
traction apophysitis
juvenile traction osteochondritis

Dr Lars Blønd discusses a case of a patient who had had Osgood Schlatters' disorder as a child, but continued to be symptomatic into adulthood.