Located between the distal iliotibial band and the lateral femoral epicondyle, this bursa reduces friction as the IT band repeatedly crosses the epicondyle during flexion and extension. It is anatomically continuous with or adjacent to the iliotibial band bursa classified at the knee level.
Central to the pathophysiology of iliotibial band syndrome in runners and cyclists. Bursal thickening and fluid accumulation are visible on MRI and ultrasound. Load management, hip abductor strengthening, and addressing training errors are the mainstays of treatment.
Repetitive friction of the IT band over the lateral femoral epicondyle causing bursal inflammation and sharp lateral knee pain at 30 degrees flexion, classically at the 2 km mark in runners.
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