Abstract
Objectives
The purpose of this study was to investigate whether a correlation exists between 18F-fluorodeoxyglucose (FDG) uptake and prognostic factors in triple-negative breast cancer (TNBC).
Methods
Between January 2009 and December 2013, 103 patients (mean age, 50.6 years) with primary TNBC (mean, 2.6 cm; range, 1.0–6.5 cm) underwent 18F-FDG PET/CT for initial staging. Correlations between maximum standardized uptake value (SUVmax) on PET/CT and prognostic factors including tumour size, nodal status, histological grade, Ki-67 proliferation index, tumour suppressor p53, and ‘basal-like’ markers (epidermal growth factor receptor and CK 5/6) were assessed.
Results
The mean SUVmax of the 103 tumours was 10.94 ± 5.25 (range: 2–32.8). There was a positive correlation between SUVmax and Ki-67 (Spearman’s rho = 0.29, P = 0.003) and tumour size (Spearman’s rho = 0.27, P = 0.006), whereas this relationship was not observed in the nodal status, histological grade, p53 status and ‘basal-like’ phenotypes. In a multivariate regression analysis, Ki-67 (P < 0.001) and tumour size (P = 0.009) were significantly associated with SUVmax in TNBCs.
Conclusions
Increased 18F-FDG uptake on PET/CT was correlated with a high Ki-67 proliferation index and larger tumour size in TNBC. These results suggest a potential role of 18F-FDG PET/CT in identifying TNBC with more aggressive behaviour.
Key points
• A wide range of FDG uptake reflected heterogeneity of cancer metabolism.
• FDG uptake was correlated with the Ki-67 proliferation index in TNBC.
• FDG uptake was correlated with tumour size in TNBC.
• FDG uptake was not correlated with ‘basal-like’ phenotype.
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Acknowledgments
The scientific guarantor of this publication is Woo Kyung Moon. The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2012R1A2A1A01010846). No complex statistical methods were necessary for this paper. Institutional Review Board approval was obtained. Written informed consent was waived by the Institutional Review Board. Methodology: retrospective, observational, performed at one institution.
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Koo, H.R., Park, J.S., Kang, K.W. et al. Correlation between 18F-FDG uptake on PET/CT and prognostic factors in triple-negative breast cancer. Eur Radiol 25, 3314–3321 (2015). https://doi.org/10.1007/s00330-015-3734-z
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DOI: https://doi.org/10.1007/s00330-015-3734-z