1. Patterns of recurrence and metastasis in BRCA1/BRCA2 ‐associated breast cancers
- Author
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Davinia S.E. Seah, William T. Barry, Nan Lin, Yun Song, Judy Garber, and Nadine Tung
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Oncology ,Cancer Research ,endocrine system diseases ,Disease ,Metastasis ,Central Nervous System Neoplasms ,0302 clinical medicine ,brain metastases ,Medicine ,030212 general & internal medicine ,skin and connective tissue diseases ,Aged, 80 and over ,BRCA1 Protein ,Bone metastasis ,Middle Aged ,Metastatic breast cancer ,medicine.anatomical_structure ,Lymphatic Metastasis ,030220 oncology & carcinogenesis ,Cohort ,Original Article ,Female ,Adult ,Heterozygote ,medicine.medical_specialty ,recurrence ,Breast Neoplasms ,Young Adult ,03 medical and health sciences ,Breast cancer ,Internal medicine ,Humans ,Germ-Line Mutation ,Aged ,Retrospective Studies ,BRCA2 Protein ,Lung ,business.industry ,Breast Disease ,Cancer ,Original Articles ,BRCA1 ,medicine.disease ,BRCA2 ,Survival Analysis ,Lymph Nodes ,Disease Site ,Neoplasm Recurrence, Local ,business - Abstract
Background Breast cancer subtypes are associated with distinct metastatic patterns. Whether germline BRCA1 /BRCA2 mutation status is independently associated with central nervous system (CNS) relapse, controlling for tumor subtype, is unknown. Methods Patients who were treated at Dana‐Farber Cancer Institute and diagnosed with a first locoregional recurrence (LRR) or metastasis between 1981 and 2014 were identified using 2 institutional registries: 1) patients treated for recurrent breast cancer and 2) patients who underwent BRCA testing. The frequencies of LRR, sites of metastasis, and breast cancer‐specific survival from LRR or metastasis were calculated, and the factors associated with CNS recurrence were evaluated using multivariable logistic regression models. Results The final study cohort included 30 BRCA1 mutation carriers, 32 BRCA2 mutation carriers, and 270 noncarriers. Most BRCA1 carriers (73%) had triple‐negative breast cancer; whereas most BRCA2 carriers (72%) had hormone receptor‐positive tumors. BRCA1 carriers frequently experienced lung and distant lymph node metastasis, whereas BRCA2 carriers and noncarriers most often experienced bone metastasis. Although CNS disease occurred frequently in both BRCA1 and BRCA2 carriers (53% BRCA1, 50% BRCA2, 25% noncarriers; P, Germline BRCA1 or BRCA2 alterations are associated with a high frequency (≥50%) of brain metastases in patients with locoregionally recurrent or metastatic breast cancer. In multivariable analysis, only BRCA2 mutation (P = .006) was significantly associated with central nervous system metastasis when controlling for breast cancer subtype.
- Published
- 2019
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