Abstract
Purpose
Carbon 11-choline positron emission tomography/computed tomography (11C-choline PET/CT) and subsequent local therapy for oligometastatic prostate cancer have been reported to be effective, but their effectiveness in castration-resistant prostate cancer (CRPC) remains unclear. Here, we evaluated the findings of 11C-choline PET/CT in CRPC patients and the efficacy of local treatments in correspondence of the pathologic choline uptake.
Methods
We collected 12 cases of CRPC patients who underwent 11C-choline PET/CT between 2014 and 2016. The outcomes assessed included age, the prostate-specific antigen (PSA) value, the findings of 11C-choline PET/CT, the subsequent treatments, the PSA response following the treatments, and the progression-free survival (PFS).
Results
Seven of 12 cases (median PSA, 3.29 ng/mL) had local prostate cancer and/or one or two metastatic lesions detected by the choline PET/CT. These localized lesions were treated with radiotherapy or lymphadenectomy. PSA decreased in all the seven cases and median PSA response was 86% (range, 23–100%). Median PFS was 8.5 months (range, 2.8–25.3 months). The other five cases (median PSA, 7.41 ng/mL) had multiple metastases and systemic therapies were continued in those cases.
Conclusions
11C-choline PET/CT and the correspondent local treatments may play an important role in the treatment sequence of CRPC in selected patients.
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Acknowledgements
We thank Dr. Jimpei Kumagai for collecting data and many advices for study design. This study was supported by a grant from Takeda Pharmaceutical Company Limited.
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This study was approved by the ethical committee of National Center for Global Health and Medicine (authorization number: 1552). All of the participants gave their written informed consent.
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Nozaki, K., Kawai, T., Fujimura, T. et al. Carbon 11-choline positron emission tomography/computed tomography and palliative local therapy for castration-resistant prostate cancer. Int Urol Nephrol 51, 1763–1769 (2019). https://doi.org/10.1007/s11255-019-02233-y
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DOI: https://doi.org/10.1007/s11255-019-02233-y