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Metastatic osteosarcoma to bone — Clinical Guidelines

Overview

Metastatic osteosarcoma to bone involves the spread of malignant osteosarcoma cells to bone sites, causing significant pain and potential skeletal complications. Palliative treatments aim to alleviate pain and improve quality of life.

Diagnosis

Imaging studies (bone scans, MRI, CT) to identify metastatic lesions 2 6.

Pain assessment using validated scales (e.g., Brief Pain Inventory) 1.

Biopsy confirmation of osteosarcoma in primary or metastatic sites when feasible.

Management

First-line treatments:

- Radiotherapy (RT): Often used initially for pain palliation 1. - Radioisotopes: Strontium-89, Samarium-153, and Rhenium-186/188 for pain relief 2 3 5 6.

Adjunctive treatments:

- Opioids: Transdermal fentanyl demonstrated superior pain relief compared to codeine/paracetamol when combined with RT 1. - Bisphosphonates: Pamidronate disodium used for pain management and potential bone stabilization 3.

Special Populations

Elderly: Considerations for myelosuppression risks with radioisotopes like Samarium-153 5.

Comorbidities: Pre-existing hematological conditions may influence response and toxicity to radioisotopes 5.

Key Recommendations

Combine radiotherapy with transdermal fentanyl for improved pain management in metastatic bone pain (Evidence: Strong 1).

Utilize radioisotopes such as Samarium-153-EDTMP or Strontium-89 for effective pain palliation, considering potential tumoricidal effects (Evidence: Moderate 2 3 5).

Monitor for myelosuppression, particularly in elderly patients and those with pre-existing hematological conditions, when administering Samarium-153-EDTMP (Evidence: Moderate 5).

References

1 Mystakidou K, Katsouda E, Kouloulias V, Kouvaris J, Tsiatas M, Vlahos L. Comparison of transdermal fentanyl with codeine/paracetamol, in combination with radiotherapy, for the management of metastatic bone pain. Journal of opioid management 2005. link 2 Finlay IG, Mason MD, Shelley M. Radioisotopes for the palliation of metastatic bone cancer: a systematic review. The Lancet. Oncology 2005. link70206-0) 3 Wang RF, Zhang CL, Zhu SL, Zhu M. A comparative study of samarium-153-ethylenediaminetetramethylene phosphonic acid with pamidronate disodium in the treatment of patients with painful metastatic bone cancer. Medical principles and practice : international journal of the Kuwait University, Health Science Centre 2003. link 4 Argiro G, Atzei G, Boemi S, Cipriani C, Shukla SK, Rossi G et al.. A process for the recovery of strontium from the urine of patients injected with 89Sr. Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 1998. link00301-1) 5 Farhanghi M, Holmes RA, Volkert WA, Logan KW, Singh A. Samarium-153-EDTMP: pharmacokinetic, toxicity and pain response using an escalating dose schedule in treatment of metastatic bone cancer. Journal of nuclear medicine : official publication, Society of Nuclear Medicine 1992. link 6 Ketring AR. 153Sm-EDTMP and 186Re-HEDP as bone therapeutic radiopharmaceuticals. International journal of radiation applications and instrumentation. Part B, Nuclear medicine and biology 1987. link90046-8)

Metastatic osteosarcoma to bone