Bone Metastases: What to Do When Single-Fraction Radiotherapy Fails to Relieve Pain
When a single-fraction external beam radiotherapy course does not achieve pain relief at a bone metastasis site within 10 days, a defined escalation protocol applies — centred on surgical management of the affected extremity.
Previous treatment — goal not achieved
The prior approach was external beam radiotherapy delivered as a single 8 Gy fraction to the painful uncomplicated bone metastasis, with prophylactic dexamethasone and antiemetic support. The intended goal — bone pain relief at the irradiated site within 10 days — was not reached, triggering escalation to this protocol.
Next-line approach
This protocol involves an orthopaedic surgical strategy targeting fracture prevention or stabilisation of the affected extremity — the complete operative approach, technique selection, and postoperative plan are defined in the full protocol.
Clinical goals
- Pain relief at the fracture site
- Restored functional mobility of the affected extremity
References
DOI: 10.1016/j.annonc.2020.07.019
- In patients with good PS, pathological or impending pathological fractures of the extremities are preferentially treated with orthopaedic surgery to fix or prevent fracture.
- Prophylactic stabilisation of impending fractures is generally preferred to fixation after fracture as functional recovery is better, inpatient stays are shorter and surgical complications fewer.
- In the proximal femur and humerus, a long-stem cemented or modular tumour endoprosthesis is preferred to facilitate rapid mobilisation.
- In the diaphysis of a long bone, a plate, an intramedullary nail or a prosthesis may be implanted.
- Postoperative fractionated RT is usually recommended to prevent prosthesis failure and reduce the need for subsequent surgery.
- Prophylactic surgery is generally recommended for lesions 30 mm in greatest dimension, lytic destruction of 50% of the cortex of a long bone and continued pain with weight-bearing after RT.
- The predominant goals of surgical treatment are to maintain patient functionality and mobility by relieving pain preventing impending fractures and/or neural compression or stabilising a pathological fracture.
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