Bone metastasis fixation
When a metastasis weakens a bone or causes a fracture, fixation stabilizes it with nails or plates to relieve pain and restore weight-bearing, without replacing the bone. It is planned within a multidisciplinary oncologic plan.
Assessing fracture risk
How much the metastasis has weakened the bone, the prognosis and the person's general condition are all weighed. When fracture risk is high, getting ahead of it and stabilizing the bone before it breaks (prophylactic surgery) usually gives better results —less pain, less hospital time and better function— than operating on a fracture that has already occurred.
Before stabilizing a bone lesion it is essential to confirm that it truly is a metastasis and not a primary bone tumor: the oncologic history is reviewed and, when there is any doubt, a biopsy is taken. When there is no known cancer, staging is completed before the biopsy —blood tests and imaging of the chest, abdomen and pelvis, plus a whole-body bone study—, which in most cases identifies the tumor of origin and avoids operating on a mislabeled lesion. Fixing an undiagnosed bone sarcoma by mistake can spread it and seriously compromise later treatment. The plan also changes for a solitary metastasis of renal or thyroid origin: in those cases it may be preferable to resect the segment en bloc and replace it, rather than simply fixing it.
The decision is always made together with the oncology team, weighing the expected benefit and the point the disease has reached.
Fixation options
A bone at high risk of fracture is stabilized before it breaks, usually with an intramedullary nail that protects the whole length of the bone. When the lesion has destroyed the femoral head or neck, a nail has nothing to anchor into and the right course is to replace rather than fix (see prosthetic replacement for metastasis).
A pathologic fracture that has already occurred is fixed with nails or plates, often reinforcing the tumor-weakened area with cement for immediate stability.
A fixation that has to last
Unlike an ordinary fracture, here the bone will not always unite, because the tumor is still present. That is why the fixation is designed to bear weight on its own from day one and to last for the patient's expected survival, avoiding reoperations.
After stabilizing the bone, radiotherapy to the area is often added to control the tumor locally.
Risks and considerations
- Infection and wound-healing problems, in often-debilitated patients.
- Hardware failure or disease progression, which may require another operation.
- It is usually a palliative treatment: coordinated with the oncologic plan and radiotherapy.
Shared decision-making
The decision to operate is made together with you and your oncology team: we discuss your symptoms, the fracture risk, the point your illness has reached and your other treatments (such as radiotherapy), the expected benefits, the risks and the alternatives. Surgery does not guarantee an outcome or cure the underlying disease; it aims to relieve pain and restore stability and function and, in selected cases, achieve local control of the lesion.
This information is educational and does not replace a medical evaluation. Every case requires an individualized assessment and treatment, and no surgery guarantees an outcome.
Questions about your case?
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