The Orthoncology Clinic — Dr Srimanth B S
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Bone metastases — overview & management options

When cancer cells travel from their original site to the skeleton, they can weaken bones and cause pain or fractures. Modern care combines targeted medications, focused radiotherapy, image-guided procedures and limb-saving surgery — tailored to each patient's disease and goals.

What are bone metastases?

Bone metastases occur when cancer cells spread from their original site to the skeleton via blood or lymph. They signal advanced disease and can weaken bones, causing pain or fractures.

Tumour cells secrete factors (TGF-β, RANK-L, PTHrP) that stimulate osteoclasts, creating a "vicious cycle" of bone breakdown and further tumour growth. Drugs such as bisphosphonates and denosumab help interrupt this cycle.

Key point: Up to 80% of people with widespread cancer develop skeletal involvement — most often in the spine, pelvis, ribs, femur and humerus.

Who is at risk?

Cancers most likely to spread to bone:

Breast
Lung
Prostate
Kidney
Thyroid

Red-flag symptoms

  • New or worsening bone pain: Deep, aching pain — often worse at night and not relieved by rest.
  • Fracture after minor trauma: A fall or twist that breaks the femur or humerus may signal a weakened, infiltrated bone.
  • Sudden weakness or numbness: Could indicate spinal cord compression — a medical emergency.
  • Confusion, thirst, nausea: Possible high blood calcium (hypercalcemia) from bone breakdown.
Symptoms & complications

How bone metastases present

Bone pain

Deep, aching, often worse at night and progressive over weeks.

Pathological fractures

Most common in the femur and humerus; even minor trauma can break the bone.

Spinal cord compression

Back pain with weakness, numbness or loss of bowel/bladder control.

Hypercalcemia

Thirst, nausea and confusion from elevated blood calcium.

Diagnosis

How bone metastases are diagnosed

Early diagnosis prevents complications and guides treatment.

History & examination

Prior cancer, new bone pain, and a focused neurological and musculoskeletal exam.

Blood tests

Alkaline phosphatase, calcium, tumour markers and routine labs.

Imaging

X-ray for lytic/sclerotic lesions, MRI for cord compression, bone scan or PET-CT for whole-body staging.

Biopsy

Core needle sampling when the primary is unknown or only a solitary lesion is found.

Treatment goals

Relieve pain
Prevent or fix fractures
Preserve mobility & quality of life
What treatment options exist?

A stepwise, personalised approach

Treatment is layered — medications, focused radiation, image-guided procedures and surgery — chosen for each patient's lesion, disease burden and goals.

Step 1

Observation & medical management

Many patients are first managed with medication and supportive care — particularly when lesions are small and not weight-bearing.

  • Analgesics from NSAIDs to opioids for pain control
  • Bone-targeted agents — bisphosphonates (zoledronic acid) or denosumab — to reduce fractures and hypercalcemia
  • Systemic therapy: chemotherapy, hormone therapy or targeted agents based on cancer type
Step 2

Radiotherapy & SBRT

Focused radiation delivers rapid pain relief and local tumour control — often within days.

  • Conventional external-beam radiotherapy for diffuse painful metastases
  • Stereotactic body radiotherapy (SBRT): high-dose, precise treatment in 1–5 sessions
  • >80% local tumour control with minimal damage to surrounding nerves and organs
Step 3

Minimally invasive procedures

Image-guided day-care procedures that stabilise bone and relieve pain without open surgery.

  • Vertebral augmentation / kyphoplasty for painful spinal collapse
  • Percutaneous cementoplasty for pelvic or acetabular lesions
  • Radiofrequency or cryoablation for small, painful metastases
Step 4

Surgical stabilisation

Indicated for impending or actual fractures in weight-bearing bones, and for selected oligometastatic patients with curative intent.

  • Intramedullary nailing with cement augmentation
  • Plate and screw fixation plus cement
  • Tumor endoprosthesis for large joint-involving metastases
Case example · Surgical management

Unknown metastatic adenocarcinoma of the hip — successful limb-saving surgery with >4-year survival

A real patient story illustrating how targeted surgical reconstruction in carefully selected metastatic disease can restore walking, relieve pain and offer durable long-term survival.

Modern advances

New hope: targeted therapy, immunotherapy & SBRT

Targeted chemotherapy

Agents that block the specific molecular pathways tumours rely on — tyrosine kinase inhibitors and tailored hormone therapy — reducing systemic toxicity compared with classical chemotherapy.

Immunotherapy

Immune checkpoint inhibitors, monoclonal antibodies and CAR-T strategies help the patient's own immune system recognise and destroy cancer cells — stabilising disease and easing symptoms.

SBRT

Stereotactic body radiotherapy delivers high-dose, precisely targeted radiation in very few sessions — with >80% local control, rapid pain relief and minimal damage to nearby structures.

Oligometastatic disease

When cancer has spread to only a limited number (usually ≤5) of sites, the disease is considered potentially curable or controllable with aggressive local and systemic treatment — combining surgical resection of bone metastases, SBRT and systemic therapy to achieve prolonged disease control and, in selected patients, cure.

Real patient scenarios

Four ways we manage bone metastases

Each patient's plan is built around their disease biology, functional status and personal goals.

Case 1 · Curative intent

Solitary bone metastasis — limb-saving surgery

A 55-year-old woman, 6 years after breast cancer treatment, developed persistent hip pain. Imaging and biopsy confirmed a solitary metastasis in the proximal femur.

Our approach: Surgical resection of the lesion with tumor endoprosthetic reconstruction was offered given her good health and limited disease.
Outcome: She regained functional independence with rapid return to mobility — illustrating the role of aggressive treatment in limited metastatic disease.
Case 2 · Palliation

Pathological fracture in advanced disease

A 60-year-old man with known lung cancer presented with sudden arm pain after a minor knock. Imaging confirmed a pathological humeral fracture from metastatic infiltration.

Our approach: Extended curettage, intramedullary nailing and cement augmentation — focused on palliation and preserving arm function.
Outcome: The fracture was stabilised, pain relieved and arm function restored — prioritising quality of life given his overall prognosis.
Case 3 · Spinal emergency

Vertebral metastasis with cord compression

A 66-year-old man presented with back pain and neurological symptoms. MRI revealed a lumbar metastasis causing vertebral collapse and cord compression; prostate cancer was the primary.

Our approach: Systemic therapy was combined with kyphoplasty to stabilise the vertebra and relieve pain in a coordinated multidisciplinary plan.
Outcome: Further neurological deterioration was prevented and pain controlled — restoring function and confidence.
Case 4 · Oligometastatic SBRT

Acetabular metastasis treated with SBRT

A 48-year-old woman with prior breast cancer presented with localised hip pain from a solitary acetabular metastasis with preserved joint function.

Our approach: Stereotactic body radiotherapy (SBRT) was used to deliver high-dose focused radiation in a few sessions.
Outcome: She experienced significant pain relief and maintained mobility without surgery — modern focused radiotherapy preserving quality of life.

Why multidisciplinary care matters

Complex cases — spinal cord compression, large pelvic tumours or multiple lesions — benefit from input by oncology, orthopaedics, radiation oncology, radiology and palliative care. This team approach tailors treatment, minimises complications and supports rehabilitation.

Take-home summary

  • Bone metastases are a common complication of advanced cancer — but they are treatable.
  • Watch for new bone pain, fractures or neurological signs and seek evaluation early.
  • Diagnosis combines imaging and, when needed, a core needle biopsy.
  • Treatment spans observation, medications, radiotherapy, minimally invasive procedures and surgery.
  • Targeted therapy and immunotherapy have markedly improved survival and symptom control.
  • Oligometastatic disease offers a window for aggressive, curative-intent treatment.
  • A multidisciplinary team optimises outcomes and preserves quality of life.

References

  1. Coleman RE. Metastatic bone disease: clinical features, pathophysiology and treatment strategies. Cancer Treat Rev. 2001;27(3):165–176.
  2. Diaz-Lagares A et al. Immunotherapy for bone metastases: new insights and challenges. J Immunother Cancer. 2022;10(7):e004901.
  3. Hellman S, Weichselbaum RR. Oligometastases. J Clin Oncol. 1995;13(1):8–10.
  4. Palma DA et al. SABR-COMET: stereotactic ablative radiotherapy vs standard of care in oligometastatic cancers. Lancet. 2019;393(10185):2051–2058.
  5. Milano MT et al. Surgical Treatment of Bone Metastases: An Evolving Paradigm. J Surg Oncol. 2018;117(6):1143–1156.
  6. Klimo P Jr et al. Surgery for spinal metastases: the current state of the art. J Neurosurg Spine. 2010;13(1):13–21.
  7. Kusznir JO et al. Stereotactic body radiotherapy for spinal metastases. Int J Radiat Oncol Biol Phys. 2017;98(1):111–119.
  8. Bongers ME et al. SBRT for bone metastases in the extremities and pelvis: a systematic review. Radiother Oncol. 2021;157:271–279.

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