Iliotibial Band Distal Insertion

insertio tractus iliotibialis distalis

The distal iliotibial band inserts onto Gerdy's tubercle of the lateral tibial plateau, with additional fibres inserting into the fibular head, the lateral intermuscular septum, and the lateral patellar retinaculum. The ITB functions as both a lateral knee stabiliser and a dynamic extensor mechanism in early knee flexion, transitioning to a flexor as knee flexion exceeds 30 degrees.

Region: Knee

Clinical Relevance

Clinical Notes

The distal ITB insertion is the focus of iliotibial band syndrome assessment and treatment. Kaplan fibres, which are deep proximal fibres from the lateral femur to the proximal tibia, are distinct from the distal Gerdy's insertion and are important in anterolateral ligament anatomy. Proximal lengthening or Z-plasty of the ITB for chronic syndrome targets the distal insertion tension. The distal ITB is assessed with the Noble compression test directly over Gerdy's tubercle at 30 degrees knee flexion.

Pathology

Common Injuries & Conditions

IT Band Syndrome at Gerdy's Tubercle

Traction inflammation at the distal ITB insertion on Gerdy's tubercle producing lateral tibial pain distinct from the classic lateral femoral epicondyle pain, more common in cyclists than runners.