Abstract
Purpose
To determine the utility of 18F-sodium fluoride positron emission tomography-computed tomography (18F-NaF PET/CT) in the imaging assessment of therapy response in men with osseous-only metastatic prostate cancer.
Methods
In this Institutional Review Board–approved single institution retrospective investigation, we evaluated 21 18F-NaF PET/CT scans performed in 14 patients with osseous metastatic disease from prostate cancer and no evidence of locally recurrent or soft-tissue metastatic disease who received chemohormonal therapy. Imaging-based qualitative and semi-quantitative parameters were defined and compared with changes in serum PSA level.
Results
Qualitative and semi-quantitative image-based assessments demonstrated > 80% concordance with good correlation (SUVmax κ = 0.71, SUVavg κ = 0.62, SUVsum κ = 0.62). Moderate correlation (κ = 0.43) was found between SUVmax and PSA-based treatment response assessments. There was no statistically significant correlation between PSA-based disease progression and semi-quantitative parameters. Qualitative imaging assessment was moderately correlated (κ = 0.52) with PSA in distinguishing responders and non-responders.
Conclusion
18F-NaF PET/CT is complementary to biochemical monitoring in patients with bone-only metastases from prostate cancer which can be helpful in subsequent treatment management decisions.
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Abbreviations
- CT:
-
computed tomography
- PET:
-
positron emission tomography
- PSA:
-
prostate-specific antigen
- MDP:
-
methylene diphosphonate
- NaF:
-
sodium fluoride
- P:
-
progressor
- NP:
-
non-progressor
- R:
-
responder
- NR:
-
non-responder
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Funding
We acknowledge National Institutes of Health grants R01-CA111613 (PI: H. Jadvar) and P30-CA014089 (USC Norris Comprehensive Cancer Center).
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Erik M. Velez, Bhushan Desai, and Hossein Jadvar declare no conflicts of interest. There was no direct funding for this study.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Velez, E.M., Desai, B. & Jadvar, H. Treatment Response Assessment of Skeletal Metastases in Prostate Cancer with 18F-NaF PET/CT. Nucl Med Mol Imaging 53, 247–252 (2019). https://doi.org/10.1007/s13139-019-00601-1
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DOI: https://doi.org/10.1007/s13139-019-00601-1