Alleviating Metastatic Bone Pain: The Role of Strontium-89 Chloride in Palliative Care

Strontium-89 chloride is a radioisotope used in the treatment of bone pain, particularly in patients who have metastatic bone cancer. When cancer spreads to the bones, it often results in painful bone lesions. The application of strontium-89 chloride presents a palliative treatment option to alleviate the severe pain experienced by these patients.

The mechanism of action of strontium-89 chloride is unique. It mimics calcium due to its similar chemical properties, allowing it to be absorbed by the bones, particularly in areas with increased turnover, such as cancerous lesions. Once in the bone, strontium-89 emits beta radiation, which has a short range of penetration. This localised radiation helps to relieve pain by killing the cancer cells and reducing the inflammation in the bone while minimising damage to the surrounding healthy tissues.

The administration of strontium-89 chloride is typically done intravenously. The radioactive properties of strontium-89 necessitate careful handling and administration by trained medical personnel to ensure the safety of both the patient and the healthcare provider. The relief from pain can last for several months, making it a viable option for those suffering from chronic bone pain due to metastatic cancer.

The efficacy of strontium-89 chloride in pain relief has been well documented in clinical trials. Patients often report a considerable reduction in pain, improved mobility, and a better quality of life following treatment. Moreover, St-89 chloride can be used in conjunction with other cancer therapies, including chemotherapy and hormone therapy, allowing for a comprehensive approach to cancer treatment.

However, the use of strontium-89 chloride is not without risks. Side effects may include bone marrow suppression, lowering blood cell counts and increasing sensitivity to infections. As a radioactive substance, there’s also a risk of radiation exposure to others, so stringent safety protocols are followed during administration and post-treatment monitoring.

Furthermore, the cost and availability of strontium-89 chloride treatment may pose challenges. The production of strontium-89 chloride requires nuclear reactors, and the cost of treatment can be unreasonable for some patients. A thorough assessment must determine the suitability of strontium-89 chloride treatment for each individual, considering the potential benefits and risks.

The table below summarises the radiopharmaceutical properties and applications of strontium-89 chloride:

RadioisotopeStrontium-89 (Sr-89)
Radiation TypeBeta radiation
Half-lifeApproximately 50.5 days
Mechanism of ActionMimics calcium localises to the bone, particularly at high turnover areas like metastatic lesions. It emits beta radiation to kill cancer cells and reduce inflammation in bones.
AdministrationIntravenous injection
Primary ApplicationPalliation of bone pain in metastatic bone cancer patients
EfficacySignificant reductions in pain, improved mobility, and better quality of life were reported in clinical trials.
Side EffectsBone marrow suppression, the potential for radiation exposure to others
Compatibility with Other TreatmentsIt can be used alongside other cancer treatments like chemotherapy and hormone therapy
Cost and AvailabilityProduction requires nuclear reactors, and cost can be prohibitive for some patients
A summary of the radiopharmaceutical properties and applications of strontium-89 chloride for the palliation of bone pain in metastatic bone cancer patients.


In summary, strontium-89 chloride provides a valuable therapeutic option for the palliation of bone pain in patients with metastatic bone cancer. Its ability to target bone lesions with a minimal impact on surrounding tissues, combined with its potential to improve the quality of life for patients, underscores its importance in the management of metastatic bone disease. Nonetheless, careful consideration of the risks, including bone marrow suppression and the costs associated with treatment, is essential in the clinical decision-making process.

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