Which condition presents with lateral knee pain and IT band tightness in runners?

• A. Iliotibial band syndrome
• B. Medial meniscus tear
• C. Lateral collateral ligament sprain
• D. Patellar tendinopathy

Answer: (A)

Iliotibial band syndrome presents with lateral knee pain in runners because the iliotibial band, a thick connective tissue strap along the outside of the thigh, becomes tight and rubs over the lateral femoral epicondyle during repetitive knee bending. This friction is amplified with running, especially downhill or for long distances, leading to pain and tenderness on the outer knee and a sense of tightness along the band. This pattern is distinct from other knee injuries: a medial meniscus issue tends to cause medial joint line pain with possible locking; a lateral collateral ligament sprain follows a varus trauma and presents with instability; patellar tendinopathy causes anterior knee pain at the patellar tendon, not the outer knee. Treatment focuses on reducing friction and restoring hip and knee mechanics through stretching,软 rolling, strengthening, and a gradual return to running.