This study evaluated the diagnostic impact of using skeletal 18F-fluoride PET/CT on patients with painful bone metastases to schedule an early palliative radionuclide treatment. Methods: The skeletal involvement from prostate cancer metastases was assessed by both 99mTc-diphosphonate bone scan (BS) and 18F-fluoride PET/ CT within four weeks in 24 patients (67.7 ± 5.1 years) suffering from a borderline degree of bone pain for which radionuclide palliation was not shortly planned for administration. The BS and 18F-fluoride PET/CT results were compared, assessing the number and extension of the skeletal sites involved. Afterward, the patients were randomly assigned either to the study group (N = 12) receiving radionuclide therapy (Samarium-153 EDTMP) or to the control group (N = 12) not receiving radionuclide therapy. The short-term results from the radionuclide palliation group (evaluated with a visual analogue scale) were compared with the controls. Results: Overall, at BS, 7.6 ± 1.4 sites were considered metastatic, involving at least 5 ± 1 body regions. At 18F-fluoride PET/CT, 116 ± 19 sites presented metastatic involvement with 12/12 body regions concerned. No differences were found in regards to either the number of metastatic sites or regions at both BS and 18F-fluoride PET/CT between the study group and controls (p = ns). At CT, 88 blastic metastases were identified, whereas 110 were mainly lytic. Most of mainly lytic lesions were not detectable at BS. The reduction in total discomfort and bone pain in the study group was significantly greater than in the controls (p b 0.0001). Conclusion: Sm-153 EDTMP therapy should be considered for patients with early bone pain from prostate cancer even if their BS only indicates a few metastases before the initiation of a severe pain syndrome. 18F-fluoride PET/CT may be helpful in deciding if the implementation of bone pain palliation using bone-seeking radionuclides at pain onset is necessary.
File in questo prodotto:
Non ci sono file associati a questo prodotto.