Where is the most common location for knee OA symptoms?

Where is the most common location for knee OA symptoms?

• A. Lateral femoral condyle and tibial plateau
• B. Posterior capsule
• C. Patellar tendon origin
• D. Medial femoral condyle and patella articular surface

Answer: (D)

In knee osteoarthritis, symptoms most commonly localize to the medial compartment because this area bears the majority of the load during walking, especially when there is varus alignment. Degeneration tends to start in the medial tibiofemoral joint, with pain and stiffness often felt along the medial joint line. The medial femoral condyle is a primary site of cartilage loss, and involvement of the patellofemoral (patella articular) surface is also commonly seen as disease progresses, which explains pain around the patellar area as well. The other sites listed—lateral compartments, the posterior capsule, or the patellar tendon origin—are less typical as the primary locations for OA symptoms, making the medial pattern the best fit.

In knee osteoarthritis, symptoms most commonly localize to the medial compartment because this area bears the majority of the load during walking, especially when there is varus alignment. Degeneration tends to start in the medial tibiofemoral joint, with pain and stiffness often felt along the medial joint line. The medial femoral condyle is a primary site of cartilage loss, and involvement of the patellofemoral (patella articular) surface is also commonly seen as disease progresses, which explains pain around the patellar area as well. The other sites listed—lateral compartments, the posterior capsule, or the patellar tendon origin—are less typical as the primary locations for OA symptoms, making the medial pattern the best fit.