PMC4983338_01
Selected axial (a), coronal (b), and sagittal (c) cuts of CT demonstrating dissociated glenoid component with cage remaining seated in the glenoid.
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fig1
A CT arthrogram was ordered to evaluate if there was a rotator cuff tear but instead found that the glenoid component had dissociated and was sitting posterior to the humeral head (Figure 1).
Postoperative X-ray, day of primary TSA.
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fig2
Close inspection of the postoperative films, as early as those immediately following surgery in the postanesthesia care unit, confirmed that the glenoid had in fact failed acutely (Figure 2).
Explanted glenoid component. Note that one of the pegs and the cage have dissociated from the remainder of the glenoid component.
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fig3
The glenoid component was retrieved from the posterior capsule. The component failure occurred at the interface between one of the pegs and its metallic cap as well as at the cage component, which had disengaged from the polyethylene (Figure 3).