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18-fluorine-fluorodeoxyglucose (FDG) positron emission tomography (PET) and mainly combined with computed tomography (CT), abbreviated as FDG PET/CT is a useful and accurate tool for staging and restaging in locally advanced breast cancer. In daily practice static images are prepared during the PET/CT examinations. However, despite the success of static PET and PET/CT imaging, the role of precise quantification of FDG-uptake – measured by dynamic acquisition – is ambiguous in the staging and management of different malignancies. In this case report, we described our experience with staging, interim and restaging dynamic PET/CT examinations of a woman suffering from breast cancer. Based on the described case we concluded that dynamic PET/CT is suitable for accurate quantification of FDG-uptake in primary breast tumors. However, performing dynamic PET/CT examinations is time-consuming, therefore, it is important to define the group of patients where their use is with the most favourable benefit/risk ratio. Furthermore, using of interim PET/CT scan is recommended in cases with clinically controversial baseline tests. Based on literature in vivo biomarkers of the dynamic PET/CT are predictive of more favourable tumor response and longer disease-free survival, as confirmed by our own results.

Response Evaluation with Dynamic FDG PET/CT during the Primary Systemic Therapy of Breast Cancer - A Case Report