During operative component fixation, cement may leak into the joint space or herniate through a fracture or bone defect into the soft tissue around the knee. The cement may irritate or damage surrounding musculature or nerves from the heat released during polymerization or via mechanical compression. CT may be required for further localization.
Baseline AP radiograph status post total knee replacement with cement herniation into the anterior muscle compartment of the calf.
Baseline AP and lateral radiographs with densities posterior to the knee joint space representing calcified loose bodies in a popliteal cyst, not herniated cement.