Coracoid Impingement
synonyms:
ICD-9
Etiology / Epidemiology / Natural History
- Impingement of lesser tuberosity on the coracoid process.
Anatomy
- Lesser tuberosity impinges on the coracoid with flexion and internal rotation.
Clinical Evaluation
- Pain reproduced with shoulder flexion and internal rotation.
- Local anesthetic injection between the lesser tuberosity and coracoid eliminates symptoms in patients with coracoid impingment.
Xray / Diagnositc Tests
- CT: normal coracohumeral distances in the adducted shoulder = 8.7mm. Flexed shoulder = 6.8mm.
- MRI: may demonstrate coracoid extending lateral to the GH joint on coronal images, associated subscapularis tear or tendinitis (axial images), or an inferior hook on the coracoid (coronal and sagittal images). MRI done in internal rotation best demonstrates coracoid impingement.
Classification / Treatment
- Corcoplasty: goal is 7mm space between coracoid and humeral head/lesser tuberosity.
Associated Injuries / Differential Diagnosis
Complications
Follow-up Care
Review References
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