Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Pulmonary artery cement embolism
- Radiologic Findings
- Posteroanterior chest radiograph (Fig. 2) after vertebroplasty at T10 body shows dense, linear opacities in right lung. On the chest CT scan (Fig. 3 & 4), dense embolic materials are noted within the pulmonary arteries in right lung. Thoracic spine CT (Fig. 5) obtained after vertebroplasty revealed the leakage of bone cement into the right paravertebral vein.

Figure 5.
- Brief Review
- The proposed mechanism of cement pulmonary embolization is generally thought to involve initial leakage of cement into the surrounding paravertebral venous system. During vertebroplasty, cement leakage outside of the vertebral body has been reported to occur in 30% to 72% of cases. In limited retrospective studies, the overall frequency of cement pulmonary embolization after kyphoplasty and vertebroplasty has been found to be approximately between 1.7% and 6.8%. Various clinical presentations and outcomes after pulmonary cement embolization have been reported in the literature. A number of cement emboli cases have been discovered in apparently asymptomatic patients. The recorded symptoms and sequelae include chest pain, shortness of breath, leg swelling (edema), hypotension, arrhythmias, heart failure, pulmonary hypertension, and severe respiratory distress. The presence of high density opacities in the chest should raise the possibility of cement emboli. These densities may be rounded, linear, or branching in appearance, the latter 2 the most suggestive of the diagnosis. Serpentine cement densities in the paravertebral veins, azygous or cava may be well seen on some plain radiographs. There is only limited experience with management of MMA cement pulmonary emboli. A small number of case reports exist in the literature of pulmonary cement emboli treated surgically. There is also very little literature in regards to medical management of cement pulmonary embolization.
Anticoagulation has been suggested as a means of reducing the risk of thrombus formation on the surface of the embolized MMA material. Although there is no evidence to support this in the literature, when cement emboli
are encountered in an asymptomatic patient they are probably of no clinical significance and have no long-term sequelae.
- References
- Pelton WM, Kirsch J, Candocia FJ et al. Methylmethacrylate pulmonary emboli : radiographic and computed tomographic findings. J Thorac Imaging 2009;24:241-247
- Keywords
- vascular, embolic, iatrogenic,