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During operative component fixation, cement may leak into the joint space or herniate through a fracture or bone defect into the soft tissues. The cement may irritate or damage surrounding masculature or nerves from the heat released during polymerization or via mechanical compression. CT may be required for further localization.
Baseline AP radiograph with custom intercalary endoprosthesis for resection of metastatic renal cell carcinoma to humerus with cement leakage (red arrow) into the glenohumeral joint space.
Axial CT demonstrates cement herniation posteriorly about the peg of the polyethylene glenoid component into the suprascupular and spinoglenoid notches in the course of the suprascapular nerve (arrows).