Annals of Oncology Advance Access published online on May 7, 2008
Annals of Oncology, doi:10.1093/annonc/mdn178
Myelotoxicity of samarium Sm 153 lexidronam in patients receiving prior treatment with chemotherapy or radiotherapy
1 Department of Radiation Oncology
2 Division of Medical Oncology, Magee-Womens Hospital, University of Pittsburgh Cancer Institute, Pittsburgh, PA
3 Cytogen Corporation, Princeton, NJ, USA
* Correspondence to: Dr D. E. Heron, Department of Radiation Oncology, UPMC Cancer Pavilion, University of Pittsburgh Cancer Institute, 5150 Centre Avenue, Suite No. 545, Pittsburgh, PA 15232, USA. Tel: +1-412-623-6723; Fax: +1-412-647-1161; E-mail: herond2{at}upmc.edu
Background: The effect of prior treatment with radiotherapy and/or chemotherapy on the myelotoxicity of samarium lexidronam (Sm 153) in patients with metastatic bone lesions and bone pain was described.
Methods: Single-institution retrospective chart review of patients receiving Sm 153. The effect of Sm 153 on peripheral white blood cell (WBC), platelet counts, and change from baseline was calculated.
Results: The available hematologic data from records of 58 patients receiving 100 treatments with Sm 153 were reviewed. Prior treatment with radiotherapy or chemotherapy had no effect on changes from baseline or median nadir counts for either WBC or platelets when compared with patients not having such prior treatments. Multiple treatments with Sm 153 had no effect on change from baseline in WBC or platelet counts as compared with the initial administration. Median survival following the first dose of Sm 153 was 15 months.
Conclusions: Prior treatment with radiotherapy or chemotherapy did not affect the rates of myelotoxicity. Multiple treatments with samarium Sm 153 lexidronam also had no effect on severity of myelotoxicity with successive courses. Patients with bone predominant metastatic disease may survive for extended periods of time and may safely be treated with multiple modalities of therapy.
bone pain, metastasis, quadramet, radiopharmaceutical
Received for publication June 12, 2007. Revision received March 24, 2008. Accepted for publication March 31, 2008.