Osgood-Schlatter's disease involves the tibial tubercle. It commonly occurs in adolescent boys. The diagnosis is made on clinical grounds and is characterized by swelling and pain. Radiographically, fragmentation of the tubercle is seen along with elevation away from the shaft.
Lateral radiograph of the knee. The tibial tubercle is fragmented in this young male patient. This is the radiographic appearance of Osgood-Schlatter's disease.