Osgood-Schlatter disease is characterized by localized pain and swelling at which anatomical site?

• A. Tibial tubercle
• B. Medial malleolus
• C. Calcaneal tuberosity
• D. Patellar tendon insertion

Answer: (A)

Osgood-Schlatter disease is a traction-type injury of the tibial tubercle. During adolescence, rapid growth plus repetitive pulling from the quadriceps via the patellar tendon places stress on the tibial tubercle, leading to irritation and micro-damage of the growth plate there (apophysitis). This manifests as localized pain and swelling right over the tibial tubercle, just below the knee, where the patellar tendon inserts. The tibial tubercle is the specific site affected, distinguishing it from the medial malleolus (inner ankle) or the calcaneal tuberosity (heel) and aligning with the mechanism of repetitive traction at the patellar tendon insertion.