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Year : 2020  |  Volume : 4  |  Issue : 4  |  Page : 312-317

Detailed analyses about predictive value of 18F-fluorodeoxyglucose positron emission tomography/computed tomography in invasive lobular breast cancer

Clinic of Nuclear Medicine, University of Health and Sciences, Istanbul Training and Research Hospital, Istanbul, Turkey

Correspondence Address:
Dr. Esra Arslan
Nukleer Tip Klini.i, Org. Nafiz Gurman Caddesi, Samatya, Kocamustafapasa, Fatih, Istanbul
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/bbrj.bbrj_72_20

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Backgrounds: Management of invasive lobular breast cancer (ILC) is limited with only using standard uptake value (SUV) max of 18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography. We aimed detailed predictive, prognostic and clinical value of parameters, metabolic tumor volume (MTV), and total lesion glycolysis (TLG) with survival data. Methods: Forty-nine ILC was included in this study. SUVmax, MTV, and TLG documented in molecular and histopathological subtypes. SUVmax, MTV, and TLG compared with nodal involvement, distant metastasis, estrogen receptor (ER), progesterone receptors (PR) and HER status, Ki-67 and survival data. Results: 61.2% luminal A, 36.7% luminal B and 2.0% TN. 53.1% classic and 46.9% pleomorphic. 93.9% ER + and 81.6% had e-cadherin loss. Mean SUVmax was 8.32 ± 4.73. No statistically significant relationship found between classical and pleomorphic with SUVmax (P = 0.616). FDG uptake found significantly higher with tumor >2 cm (P = 0.039). Luminal B SUVmax significantly higher than luminal A (P = 0.013). PR-, Ki-67 high expression, axillary involvement and luminal B significantly reduced survival time (P = 0.034, 0.019, 0.032, and 0.005, respectively). Statistically significant correlation found between high MTV and TLG, tumor diameter (TD) (P = 0.001 and 0.000, respectively). Conclusions: Loss e-cadherin and pleomorphic types did not affect the prognosis. ILC shows low FDG sensitivity compared other breast cancer types, it found to be significantly associated with prognostic factors; TD, molecular subtype, Ki-67 and metastasis. Although volumetric parameters did not add extrapredictive value to FDG involvement pattern, it was found that method remains in diagnosis, staging, and treatment follow-up of ILC.

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