Diagnosis of Hill-Sachs lesion of the shoulder. Comparison between ultrasonography and arthro-CT.
OBJECTIVE
The Hill-Sachs lesion is a compression fracture caused by impact on the trabeculae of the humeral head during anterior glenohumeral dislocation. The early and accurate identification of patients who risk recurrence of shoulder dislocation requires a suitable screening method. This should be characterized by high sensitivity and specificity, low cost, and repeatability.


METHODS
The results of ultrasound examination as a screening method were evaluated, the indicator being the identification of the Hill-Sachs lesion. Using ultrasonography and conventional radiological techniques, and double contrast CT (arthro-CT), we studied 60 patients with posttraumatic instability of the shoulder.


RESULTS
Against arthro-CT as the true standard, ultrasonography showed a sensitivity of 95.6%, specificity of 92.8%, and diagnostic accuracy of 95%.


CONCLUSIONS
Ultrasonography is an acceptable screening examination for recurrent scapulohumeral dislocation and should be applied prior to other techniques of investigation such as arthro-CT or MR imaging.
Pancione
L
L
Department of Radiology, Ospedale Civile Maria Vittoria, Turin, Italy.
Gatti
G
G
Mecozzi
B
B
D000328:Adult; D003287:Contrast Media; D005260:Female; D006801:Humans; D007479:Iopamidol; D008297:Male; D012680:Sensitivity and Specificity; D012783:Shoulder Dislocation / Q000150:complications; D012784:Shoulder Fractures / Q000000981:diagnostic imaging* / Q000209:etiology; D012785:Shoulder Joint / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
D003287:Contrast Media; D007479:Iopamidol