Citation, DOI, disclosures and article data
Citation:
Gaillard F, Weerakkody Y, Bell D, et al. Bennett lesion of the shoulder. Reference article, Radiopaedia.org (Accessed on 16 Apr 2024) https://doi.org/10.53347/rID-985
Bennett lesions of the shoulder, also called thrower's exostosis refers to the mineralization of the posterior band of the inferior glenohumeral ligament.
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.
Patients may have pain during the cocking and follow-through phases of throwing. There may be tenderness of the posterior glenoid on palpation.
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.
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 9.
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8. Ferrari JD, Ferrari DA, Coumas J, Pappas AM. Posterior ossification of the shoulder: the Bennett lesion. Etiology, diagnosis, and treatment. The American journal of sports medicine. 22 (2): 171-5; discussion 175-6. doi:10.1177/036354659402200204 - Pubmed
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9. Dana J. Lin, Tony T. Wong, Jonathan K. Kazam. Shoulder Injuries in the Overhead-Throwing Athlete: Epidemiology, Mechanisms of Injury, and Imaging Findings. (2018) Radiology. doi:10.1148/radiol.2017170481
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