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- W2892874888 abstract "Abstract Breast cancer metastasis to gynaecological organs is an understudied pattern of tumour spread. We explored clinico‐pathological and molecular features of these metastases to better understand whether this pattern of dissemination is organotropic or a consequence of wider metastatic dissemination. Primary and metastatic tumours from 54 breast cancer patients with gynaecological metastases were analysed using immunohistochemistry, DNA copy‐number profiling, and targeted sequencing of 386 cancer‐related genes. The median age of primary tumour diagnosis amongst patients with gynaecological metastases was significantly younger compared to a general breast cancer population (46.5 versus 60 years; p < 0.0001). Median age at metastatic diagnosis was 54.4, time to progression was 4.8 years (range 0–20 years), and survival following a diagnosis of metastasis was 1.95 years (range 0–18 years). Patients had an average of five involved sites (most frequently ovary, fallopian tube, omentum/peritoneum), with fewer instances of spread to the lungs, liver, or brain. Invasive lobular histology and luminal A‐like phenotype were over‐represented in this group (42.8 and 87.5%, respectively) and most patients had involved axillary lymph nodes ( p < 0.001). Primary tumours frequently co‐expressed oestrogen receptor cofactors (GATA3, FOXA1) and harboured amplifications at 8p12, 8q24, and 11q13. In terms of phenotype conversion, oestrogen receptor status was generally maintained in metastases, FOXA1 increased, and expression of progesterone receptor, androgen receptor, and GATA3 decreased. ESR1 and novel AR mutations were identified. Metastasis to gynaecological organs is a complication frequently affecting young women with invasive lobular carcinoma and luminal A‐like breast cancer, and hence may be driven by sustained hormonal signalling. Molecular analyses reveal a spectrum of factors that could contribute to de novo or acquired resistance to therapy and disease progression." @default.
- W2892874888 created "2018-10-05" @default.
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- W2892874888 date "2018-10-22" @default.
- W2892874888 modified "2023-10-16" @default.
- W2892874888 title "Breast cancer metastasis to gynaecological organs: a clinico‐pathological and molecular profiling study" @default.
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- W2892874888 doi "https://doi.org/10.1002/cjp2.118" @default.
- W2892874888 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6317061" @default.
- W2892874888 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30246500" @default.
- W2892874888 hasPublicationYear "2018" @default.