Bennett lesion


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Bennett lesion

A posteroinferior glenoid-rim enthesophyte arising at the site of insertion of the posterior band of the inferior glenohumeral ligament complex, which is seen in athletes that use overhead throwing movements—e.g., baseball pitching, jai alai, cricket.

Associations
Posterior labral injury, posterior instability, anterior labral abnormalities. Posterior capsule and labral injuries have been reported in 36% and 86% of shoulders with posterior instability respectively.

Mechanics
Posterior impingement of the humeral head on the glenoid rim, with posterior capsular avulsion secondary to traction on the posterior band of the inferior glenohumeral complex.

Bennett,

Edward H., Irish surgeon, 1837-1907.
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References in periodicals archive ?
Considerable traction forces on the glenoid labrum and shoulder joint capsule can lead to superior labral lesions, including injury to the superior labrum anterior to posterior (SLAP lesion), and the Bennett lesion, a lesion peculiar to baseball players.
However, it is now known that the Bennett lesion is an extraarticular ossification of the posterior inferior capsule arising at the insertion of the capsule in the posterior inferior glenoid, unrelated to the triceps insertion.
The etiology of the Bennett lesion remains incompletely understood.
Diagnosis of a Bennett lesion is usually made with plain radiographs or CT scans.
De Maeseneer M, Jaovisidha S, Jacobson JA, et al: The Bennett lesion of the shoulder.
Furthermore, Bennett lesions are frequently associated with posterior labral injuries and posterior rotator cuff tears, which may contribute to the patient's symptoms.