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Hybrid magnetic resonance and PET imaging for prostate cancer recurrence.
Current Opinion in Oncology 2023 March 7
PURPOSE OF REVIEW: Recurrence post definitive local therapy by prostatectomy or radiation therapy is often detected via rise in serum prostate-specific antigen (PSA) levels; however, PSA rise does not localize the disease. Distinguishing local versus distant recurrence guides whether to choose subsequent local versus systemic therapy. The purpose of this article is to review imaging for prostate cancer recurrence post local therapy.
RECENT FINDINGS: Among imaging modalities, multiparametric MRI (mpMRI) is commonly used to assess for local recurrence. New radiopharmaceuticals target prostate cancer cells and enable whole-body imaging. These tend to be more sensitive for lymph node metastases than MRI or computed tomography (CT) and for bone lesions than bone scan at lower PSA levels but can be limited for local prostate cancer recurrence. Given greater soft tissue contrast, similar criteria for lymph nodes, and greater sensitivity for prostate bone metastases, MRI is advantageous to CT. MRI of the whole body and mpMRI are now feasible within a reasonable time frame and complimentary to PET imaging, enabling whole-body and pelvis-focused PET-MRI, which should be advantageous in the setting of recurrent prostate cancer.
SUMMARY: Hybrid PET-MRI with prostate cancer targeted radiopharmaceuticals and whole body with local multiparametric MRI can be complimentary for detecting local and distant recurrence to guide treatment planning.
RECENT FINDINGS: Among imaging modalities, multiparametric MRI (mpMRI) is commonly used to assess for local recurrence. New radiopharmaceuticals target prostate cancer cells and enable whole-body imaging. These tend to be more sensitive for lymph node metastases than MRI or computed tomography (CT) and for bone lesions than bone scan at lower PSA levels but can be limited for local prostate cancer recurrence. Given greater soft tissue contrast, similar criteria for lymph nodes, and greater sensitivity for prostate bone metastases, MRI is advantageous to CT. MRI of the whole body and mpMRI are now feasible within a reasonable time frame and complimentary to PET imaging, enabling whole-body and pelvis-focused PET-MRI, which should be advantageous in the setting of recurrent prostate cancer.
SUMMARY: Hybrid PET-MRI with prostate cancer targeted radiopharmaceuticals and whole body with local multiparametric MRI can be complimentary for detecting local and distant recurrence to guide treatment planning.
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