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Bone Metastases

·Nature Reviews Disease Primers·2020·513 citations·Oncology
Free Full Text·DOI·PubMed
SummaryAbstract on PubMed →

This 2020 Nature Reviews Disease Primers article surveys the epidemiology, pathophysiology, diagnosis, and multidisciplinary management of bone metastases from solid tumors and multiple myeloma. It addresses how tumors colonize bone, what skeletal morbidity results, and what treatments prevent or mitigate it. The paper synthesizes evidence across imaging, bone-targeted agents, radiotherapy, and surgery to provide a comprehensive clinical framework.

Key Findings

  • Bone metastasis prevalence varies sharply by primary: multiple myeloma 95%, prostate 85%, breast 70%, lung and kidney 40%. Breast, lung, and prostate together account for >80% of all metastatic bone disease — these are the patients filling the orthopaedic oncology clinic.
  • Metastases distribute almost entirely to the axial skeleton, not the extremities:
    –Spine: 87%
    –Ribs: 77%
    –Pelvis: 63%
    –Proximal humeri and femora: 53%
    –Distal appendicular skeleton: 1%
  • This reflects the distribution of red (hematopoietic) bone marrow and explains why we worry about vertebral and proximal femur lesions above all others.
  • The osteolytic 'vicious cycle' is the core mechanism to know: tumor cells secrete PTHrP and IL-11, which upregulate RANKL on osteoblasts, activating osteoclasts. Osteoclastic destruction releases TGFβ and calcium from bone matrix, which feed back to stimulate more tumor growth and more osteolytic factor secretion. A self-amplifying loop.
  • Myeloma bone disease is mechanistically unique: it simultaneously increases resorption (via increased RANKL and decreased OPG) AND suppresses formation (via DKK1, sclerostin, activin A). This uncoupling explains why lytic lesions do not heal even in complete remission. A clinical distinction from solid tumor metastases that has direct surgical implications.
  • Adjuvant bisphosphonates (zoledronate, clodronate, ibandronate) reduced breast cancer mortality by nearly one-fifth at 10 years (RR 0.82, 95% CI 0.73–0.93) in postmenopausal women across all biological subtypes. This benefit is absent in premenopausal women and is not replicated by denosumab. Making menopausal status the key prescribing criterion.
  • Bone scintigraphy has only 59% per-lesion sensitivity in prostate cancer and should not be used at all in multiple myeloma, renal cancer, or thyroid cancer (purely osteolytic lesions produce minimal tracer uptake). When staging is high-stakes, escalate to whole-body MRI or PSMA-PET–CT, which identified polymetastatic disease missed by conventional imaging in the illustrated case.
  • Before untreated bone-targeted therapy, 64% of breast cancer patients with bone metastases experienced at least one SRE within 21–24 months. Including 49% fracture rate and 33% requiring radiotherapy. These numbers justify aggressive BTA initiation at diagnosis of bone involvement.
Board PearlAdjuvant bisphosphonates cut breast cancer mortality by one-fifth at 10 years — but only in postmenopausal women, and denosumab does not replicate this benefit.

Clinical Relevance

As an orthopedic surgeon, you will be consulted on pathological fractures and impending fractures in patients whose primary oncologists are deciding on systemic therapy. This paper gives you the framework to understand why those decisions matter for bone healing.

In myeloma specifically: do not expect lytic lesions to heal after fixation even when the hematologist achieves complete remission. The DKK1/sclerostin-mediated suppression of osteoblast activity persists. Plan your fixation accordingly — intramedullary stabilization that bypasses the entire bone, not just the lesion.

When a postmenopausal breast cancer patient asks whether a bone medication helps her survive (not just prevent fractures), the answer is yes. Bisphosphonates reduce 10-year breast cancer mortality by approximately one-fifth. This is not true for premenopausal women and is not true for denosumab.

When bone scintigraphy shows two equivocal lesions in a prostate cancer patient being staged for surgery or radiation, remember that scintigraphy misses roughly 40% of individual lesions. If the staging result will change management, push for PSMA-PET–CT or whole-body MRI before committing to a treatment plan.

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Reference

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Bellamy, Stitt, et al.·The Journal of rheumatology·1988·7,828 citations·Hip & Knee
Reference

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Reference

The Oswestry Disability Index.

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Reference

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Haynes, Safe Surgery Saves Lives Study Group, et al.·N Engl J Med·2009·5,579 citations·General
Reference

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Constant, Murley·Clin Orthop Relat Res·1987·5,271 citations·Shoulder & Elbow
Reference

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Tegner, Lysholm·Clin Orthop Relat Res·1985·4,572 citations·Sports Medicine
Reference

Sf-36 Health Survey Update|Citation only

Ware·Spine·2000·4,490 citations·General
Reference

Rationale of the Knee Society Clinical Rating System.

Insall, Scott, et al.·Clin Orthop Relat Res·1989·4,195 citations·Hip & Knee
Reference

Knee Injury and Osteoarthritis Outcome Score (koos)--Development of a Self-Administered Outcome Measure.

Roos, Beynnon, et al.·J Orthop Sports Phys Ther·1998·3,837 citations·Sports Medicine
Reference

Evaluation of Knee Ligament Surgery Results with Special Emphasis on Use of a Scoring Scale.

Lysholm, Gillquist·Am J Sports Med·1982·2,762 citations·Sports Medicine
Reference

Development and Validation of the International Knee Documentation Committee Subjective Knee Form.

Irrgang, Shelborne, et al.·Am J Sports Med·2001·2,141 citations·Sports Medicine
Reference

Delirium in Older Persons.|Citation only|

Inouye·N Engl J Med·2006·2,082 citations·General
Reference

Calcium Phosphate Ceramics as Hard Tissue Prosthetics.

Jarcho·Clin Orthop Relat Res·1981·2,003 citations·Basic Science
Reference

The Knee Society Total Knee Arthroplasty Roentgenographic Evaluation and Scoring System.

Ewald·Clin Orthop Relat Res·1989·1,948 citations·Hip & Knee
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Bone Metastases

·Nature Reviews Disease Primers·2020·513 citations·Oncology
Free Full Text·DOI·PubMed
SummaryAbstract on PubMed →

This 2020 Nature Reviews Disease Primers article surveys the epidemiology, pathophysiology, diagnosis, and multidisciplinary management of bone metastases from solid tumors and multiple myeloma. It addresses how tumors colonize bone, what skeletal morbidity results, and what treatments prevent or mitigate it. The paper synthesizes evidence across imaging, bone-targeted agents, radiotherapy, and surgery to provide a comprehensive clinical framework.

Key Findings

  • Bone metastasis prevalence varies sharply by primary: multiple myeloma 95%, prostate 85%, breast 70%, lung and kidney 40%. Breast, lung, and prostate together account for >80% of all metastatic bone disease — these are the patients filling the orthopaedic oncology clinic.
  • Metastases distribute almost entirely to the axial skeleton, not the extremities:
    –Spine: 87%
    –Ribs: 77%
    –Pelvis: 63%
    –Proximal humeri and femora: 53%
    –Distal appendicular skeleton: 1%
  • This reflects the distribution of red (hematopoietic) bone marrow and explains why we worry about vertebral and proximal femur lesions above all others.
  • The osteolytic 'vicious cycle' is the core mechanism to know: tumor cells secrete PTHrP and IL-11, which upregulate RANKL on osteoblasts, activating osteoclasts. Osteoclastic destruction releases TGFβ and calcium from bone matrix, which feed back to stimulate more tumor growth and more osteolytic factor secretion. A self-amplifying loop.
  • Myeloma bone disease is mechanistically unique: it simultaneously increases resorption (via increased RANKL and decreased OPG) AND suppresses formation (via DKK1, sclerostin, activin A). This uncoupling explains why lytic lesions do not heal even in complete remission. A clinical distinction from solid tumor metastases that has direct surgical implications.
  • Adjuvant bisphosphonates (zoledronate, clodronate, ibandronate) reduced breast cancer mortality by nearly one-fifth at 10 years (RR 0.82, 95% CI 0.73–0.93) in postmenopausal women across all biological subtypes. This benefit is absent in premenopausal women and is not replicated by denosumab. Making menopausal status the key prescribing criterion.
  • Bone scintigraphy has only 59% per-lesion sensitivity in prostate cancer and should not be used at all in multiple myeloma, renal cancer, or thyroid cancer (purely osteolytic lesions produce minimal tracer uptake). When staging is high-stakes, escalate to whole-body MRI or PSMA-PET–CT, which identified polymetastatic disease missed by conventional imaging in the illustrated case.
  • Before untreated bone-targeted therapy, 64% of breast cancer patients with bone metastases experienced at least one SRE within 21–24 months. Including 49% fracture rate and 33% requiring radiotherapy. These numbers justify aggressive BTA initiation at diagnosis of bone involvement.
Board PearlAdjuvant bisphosphonates cut breast cancer mortality by one-fifth at 10 years — but only in postmenopausal women, and denosumab does not replicate this benefit.

Clinical Relevance

As an orthopedic surgeon, you will be consulted on pathological fractures and impending fractures in patients whose primary oncologists are deciding on systemic therapy. This paper gives you the framework to understand why those decisions matter for bone healing.

In myeloma specifically: do not expect lytic lesions to heal after fixation even when the hematologist achieves complete remission. The DKK1/sclerostin-mediated suppression of osteoblast activity persists. Plan your fixation accordingly — intramedullary stabilization that bypasses the entire bone, not just the lesion.

When a postmenopausal breast cancer patient asks whether a bone medication helps her survive (not just prevent fractures), the answer is yes. Bisphosphonates reduce 10-year breast cancer mortality by approximately one-fifth. This is not true for premenopausal women and is not true for denosumab.

When bone scintigraphy shows two equivocal lesions in a prostate cancer patient being staged for surgery or radiation, remember that scintigraphy misses roughly 40% of individual lesions. If the staging result will change management, push for PSMA-PET–CT or whole-body MRI before committing to a treatment plan.

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