Iliotibial Band Bursa

bursa tractus iliotibialis

A small bursa lies between the IT band and the lateral femoral epicondyle at approximately 30 degrees of knee flexion — the exact point where the IT band transitions from anterior to posterior to the epicondyle and maximal friction occurs. Inflammation of this bursa contributes to the IT band syndrome pain pattern in runners. Whether IT band syndrome is primarily bursitis or fascial friction is debated, but the bursa is consistently inflamed on MRI in symptomatic runners.

Region: Knee

Biomechanics

Function & Actions

Reduces friction between the IT band and the lateral femoral epicondyle during repetitive knee flexion-extension

Clinical Relevance

Clinical Notes

The IT band bursa is identified on MRI as a fluid signal between the IT band and the lateral femoral epicondyle at the 30-degree flexion point. Noble compression test reproduces pain over this precise anatomical location. The bursa may be injected under ultrasound guidance for acute IT band syndrome when conservative management is insufficient.

Pathology

Common Injuries & Conditions

IT Band Syndrome Bursitis

Lateral femoral epicondyle bursal inflammation in distance runners producing pain at the impingement zone, managed with load modification, foam rolling, and occasionally bursal injection.