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- W2802816227 abstract "Background: Despite the fact that heterozygosity for a pathogenic ATM variant is present in 1%–2% of the adult population, clinical guidelines to inform physicians and genetic counsellors about optimal management in that population are lacking. Methods: In this narrative review, we describe the challenges and controversies in the management of women who are heterozygous for a pathogenic ATM variant with respect to screening for breast and other malignancies, to choices for systemic therapy, and to decisions about radiation therapy. Results: Given that the lifetime risk for breast cancer in women who are heterozygous for a pathogenic ATM variant is likely greater than 25%, those women should undergo annual mammographic screening starting at least by 40 years of age. For women in this group who have a strong family history of breast cancer, earlier screening with both magnetic resonance imaging and mammography should be considered. High-quality data to inform the management of established breast cancer in carriers of pathogenic ATM variants are lacking. Although deficiency in the ATM gene product might confer sensitivity to DNA-damaging pharmaceuticals such as inhibitors of poly (ADP–ribose) polymerase or platinum agents, prospective clinical trials have not been conducted in the relevant patient population. Furthermore, the evidence with respect to radiation therapy is mixed; some data suggest increased toxicity, and other data suggest improved clinical benefit from radiation in women who are carriers of a pathogenic ATM variant. Conclusions: As in the 2017 U.S. National Comprehensive Cancer Network guidelines, we recommend high-risk imaging for women in Ontario who are heterozygous for a pathogenic ATM variant. Currently, ATM carrier status should not influence decisions about systemic or radiation therapy in the setting of an established breast cancer diagnosis." @default.
- W2802816227 created "2018-05-17" @default.
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- W2802816227 date "2018-04-01" @default.
- W2802816227 modified "2023-10-01" @default.
- W2802816227 title "Ataxia–Telangiectasia Gene (ATM) Mutation Heterozygosity in Breast Cancer: A Narrative Review" @default.
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- W2802816227 doi "https://doi.org/10.3747/co.25.3707" @default.
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