153 SmEDTMP de producción nacional en el tratamiento paliativo del dolor óseo metastásico / 153 SmEDTMP of national production in the palliative treatment of metastasic bone pain

ABSTRACT

153 SmEDTMP was obtained from enriched 153Sm irradiated at the 5 MW Chilean Research reactor and labelled at a molar ratio of 151 pH 7.5. Biodistribution, autoradiography, radiochemical purity tests were done for evaluation. 40 patients were treated with 37-55 MBq/kg weight. Bone scans using 99mTcHMDP were obtained prior and after treatment. Bone marrow depression was observed in 37 percent of them and normal liver function in all of them. In 45 percent the pain dissapear completely, in 22,5 percent significantly decreased and partially in 30 percent. In 17 patients more than one dosis was injected. Our preliminary results indicate that 153 SmEDTMP is a promising radiotherapeutic agent for palliative treatment of metastasic bone cancer pain and encourage its use specially because it can be produced in countries with low economic resources, thus a large number of patients can get the benefits of this new procedure