Purpose: The objective of this study was to evaluate whether uptake on F-fluorodeoxyglucose (F-FDG) PET could help differentiate HER2-positive from HER2-negative breast cancer brain metastases.

Methods: In this retrospective, cross-sectional study of a cohort of 14 histologically proven breast cancer brain metastases, we analyzed both preoperative F-FDG PET/CT and HER2 status of the resected/biopsied brain specimens. The maximum standardized uptake values (SUVmax) of the lesions were normalized to contralateral normal white matter and compared using Mann-Whitney tests.

Results: The study cohort was comprised of 12 women with breast cancer with a mean age of 59 years (range: 43-76 years) with a total of 14 distinct brain metastatic lesions. The SUVmax ratio of HER2-positive breast cancer brain metastases was significantly greater than that of HER2-negative lesions (3.98 vs 1.79,  = 38.00,  = 0.008).

Conclusion: The SUVmax ratio may help to identify the HER2 status of breast cancer brain metastases, if validated prospectively.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11018722PMC
http://dx.doi.org/10.1007/s13139-024-00843-8DOI Listing

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