ITB inserts onto Gerdy's tubercle of the tibia and via two more proximal bundles (superior and inferior Kaplan fibres) to the lateral femur.
Tender on compression or with positive Noble's test (pain on compression and active extension)
Classically associated with runners, step aerobics and cycling
Presents as tenderness 2-3cm above the joint.
BST appreciated on coronal fat sat images.
Signs include thickened ligament & oedema surrounding at the level of the femoral condyle
Care should be taken in ensuring that high signal changes are differentiated from normal joint fluid or knee effusion.
Treatment is by corticosteroid injection
and modification of training or
adjustment to cycling equipment.
Rupture of the iliotibial band can occur but is uncommon.
These are most common at joint level.
Injuries to the posterolateral corner are most commonly caused by a combination of rotation and varus stress. They are less common than medial collateral ligament injuries but are more disabling. They are associated with full thickness ruptures of the anterior cruciate ligament when, on occasion, the clinical signs of cruciate rupture can mask the presence of posterolateral instability. It has been said that an overlooked posterolateral corner injury is the commonest cause of anterior cruciate ligament graft failure, but not all authors agree.
The complex comprises
• FCL
• Popliteus tendon
• Bicrps Femoris
• Popliteofibular ligament
• Anterolateral ligament
• Capsule & other capsular ligaments
.
These minor ligaments can be divided into the long and short ligaments.
The long ligament is the fabellofibular ligament if a fabella is present and an
arcuate ligament if it is not.
The short ligament is the fibulopopliteal ligament.
These ligaments are variously identified on MR imaging.
Coronal oblique imaging orientated to the posterior limb of the posterior cruciate may help
