23-year-old male with recurrent right shoulder dislocation. Assess for glenoid anterior fracture.IMAGE ACQUISITIONS: CT of the right shoulder without contrast. Coronal oblique and sagittal oblique reformats were obtained. 3-D reconstructions were performed on an independent workstation. There is deficiency of the anterior/inferior glenoid as seen on the prior MRI examination. This results in loss of articulating surface along the inferior aspect of the glenoid. We are uncertain whether this is congenital or due to long-standing trauma (i.e., repeated anterior dislocations). Currently, the margins of the glenoid are corticated.There is a curvilinear focus of calcification along the anterior/inferior margin of the glenoid. This measures just over 1 cm in greatest dimension. This may represent an old adherent fracture fragment or capsular calcification.Currently, the glenohumeral joint alignment is within normal limits. However, there is flattening of the postero-lateral humeral head, indicating Hill-Sachs deformity from prior dislocation.The bones are otherwise within normal limits. The soft tissues are within normal limits given the limitations of CT relative to MRI.
Deficiency of the anterior/inferior glenoid which may be congenital or due to repeated anterior dislocations. 