bennett lesion

Bennett lesions of the shoulder, also called thrower's exostosis refers to the mineralization of the posterior band of the inferior glenohumeral ligament.

Epidemiology

The abnormality is more prevalent in overhead throwing athletes.

Associations

It is associated with posterior labral tears, posterior undersurface rotator cuff tear, and posterior subluxation of the humeral head.

Clinical presentation

Patients may have pain during the cocking and follow-through phases of throwing. There may be tenderness of the posterior glenoid on palpation.

Pathology

It is thought to be due to a traction injury of the posterior band of the inferior glenohumeral ligament during the deceleration phase of throwing.

Radiographic features

Plain radiograph and CT

It is best seen on CT or axillary view x-ray of the shoulder as a curvilinear extra-articular calcification along the posteroinferior rim of the osseous glenoid near the attachment of the posterior band of the inferior glenohumeral ligament.

MRI

In addition to showing ossification, edema within the ossification or around the capsule may suggest acute pain or injury.

Siehe auch:

• Bennett-Fraktur

und weiter:

• Bennett