The patellar ligament is commonly involved in which condition?

• A. ACL tear
• B. Meniscal tear
• C. Osgood-Schlatter disease (OSD)
• D. Tibial fracture

Answer: (C)

Patellar ligament involvement points to a traction-type issue at the tibial tubercle, where the ligament inserts. Osgood-Schlatter disease is precisely a traction apophysitis at that site in growing adolescents who do a lot of running and jumping. Repeated pulling of the patellar ligament on the tibial tubercle during rapid growth causes inflammation, tenderness, and sometimes fragmentation of the tibial tubercle itself. Clinically, you’d expect point tenderness right below the knee at the tibial tubercle, with pain that worsens with squatting or jumping and without knee instability. In contrast, an ACL tear is an intra-articular ligament injury with knee giving way; a meniscal tear involves the menisci and often joint line tenderness or catching; a tibial fracture would present as acute, focal bone pain with deformity. Thus, the patellar ligament’s involvement is most characteristic of Osgood-Schlatter disease.