Dual Time Point F-fluorodeoxyglucose Positron Emission Tomography/computed Tomography Fusion Imaging (F-FDG PET/CT) in Primary Breast Cancer
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Background: To evaluate the clinicopathological and prognostic significance of the percentage change between maximum standardized uptake value (SUV) at 60 min (SUV1) and SUV at 120 min (SUV2) (ΔSUV%) using dual time point F-fluorodeoxyglucose emission tomography/computed tomography (F-FDG PET/CT) in breast cancer.
Methods: Four hundred and sixty-four patients with primary breast cancer underwent F-FDG PET/CT for preoperative staging. ΔSUV% was defined as (SUV2 - SUV1) / SUV1 × 100. We explored the optimal cutoff value of SUV parameters (SUV1 and ΔSUV%) referring to the event of relapse by using receiver operator characteristic curves. The clinicopathological and prognostic significances of the SUV1 and ΔSUV% were analyzed by Cox's univariate and multivariate analyses.
Results: The optimal cutoff values of SUV1 and ΔSUV% were 3.4 and 12.5, respectively. Relapse-free survival (RFS) curves were significantly different between high and low SUV1 groups (P = 0.0003) and also between high and low ΔSUV% groups (P = 0.0151). In Cox multivariate analysis for RFS, SUV1 was an independent prognostic factor (P = 0.0267) but ΔSUV% was not (P = 0.152). There was a weak correlation between SUV1 and ΔSUV% (P < 0.0001, R = 0.166). On combining SUV1 and ΔSUV%, the subgroups of high SUV1 and high ΔSUV% showed significantly worse prognosis than the other groups in terms of RFS (P = 0.0002).
Conclusion: Dual time point F-FDG PET/CT evaluation can be a useful method for predicting relapse in patients with breast cancer. The combination of SUV1 and ΔSUV% was able to identify subgroups with worse prognosis more accurately than SUV1 alone.
Einama T, Yamagishi Y, Takihata Y, Konno F, Kobayashi K, Yonamine N Cancers (Basel). 2022; 14(15).
PMID: 35954351 PMC: 9367454. DOI: 10.3390/cancers14153688.
Non-conventional and Investigational PET Radiotracers for Breast Cancer: A Systematic Review.
Balma M, Liberini V, Racca M, Laudicella R, Bauckneht M, Buschiazzo A Front Med (Lausanne). 2022; 9:881551.
PMID: 35492341 PMC: 9039137. DOI: 10.3389/fmed.2022.881551.