title: Oncotype Dx recurrence score among BRCA1/2 germline mutation carriers with hormone receptors positive breast cancer.
abstract: Gene expression assays are widely used to predict risk of recurrence in early breast cancer (BC). We report the 21-gene expression assay (Oncotype Dx) recurrence score (RS) distribution of 27 BRCA carriers with estrogen receptor (ER) positive BCs, identified at Hadassah Medical Center, combined with 2 previous studies. Treatment decision and outcomes of the 27 BRCA carriers were compared with an Israeli cohort of 1594 patients published recently. We found Oncotype Dx RS low (<18), intermediate (18-30) and high (>30) among 12 (21.4%), 23 (41.1%) and 21 (37.5%) of 56 BRCA1 carriers compared with 15 (17.2%), 49 (56.3%) and 23 (26.4%) of 87 BRCA2 carriers (p = 0.2). The corresponding distribution in a population of 82,434 women published by Genomic Health was 53.4%, 36.3% and 10.3% for low, intermediate and high RS (p < 0.001 for BRCA1 and BRCA2). Treatment decision regarding chemotherapy according to RS was similar in BRCA1, BRCA2 and the control group. Two of 27 carriers had distant recurrence: a BRCA1 carrier with RS of 18 and a BRCA2 carrier with RS of 22; both have an excellent response to chemotherapy. We found an approximately ∼3 fold increased rate of high RS among BRCA1 and 2 carriers with ER positive BC compared with the general BC population. These data might indicate that hormone positive BC in BRCA carriers are molecularly unique. The surprisingly good response to chemotherapy in the metastatic setting in 2 patients may suggest that the predictive value of low-intermediate RS in carriers merits further studies.
authors.affiliation: Institute of Oncology, The Chaim Sheba Medical Center, Tel Hashomer, Israel.
authors.forename: Naama
authors.identifier: 0000-0002-8926-4154
authors.initials: N
authors.lastname: Halpern
authors.affiliation: Sharett Institute of Oncology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.
authors.forename: Amir
authors.initials: A
authors.lastname: Sonnenblick
authors.affiliation: Sharett Institute of Oncology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.
authors.forename: Beatrice
authors.initials: B
authors.lastname: Uziely
authors.affiliation: Sharett Institute of Oncology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.
authors.forename: Luba
authors.initials: L
authors.lastname: Divinsky
authors.affiliation: Sharett Institute of Oncology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.
authors.forename: Yael
authors.initials: Y
authors.lastname: Goldberg
authors.affiliation: Sharett Institute of Oncology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.
authors.forename: Tamar
authors.initials: T
authors.lastname: Hamburger
authors.affiliation: Sharett Institute of Oncology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.
authors.forename: Tamar
authors.initials: T
authors.lastname: Peretz
authors.affiliation: Sharett Institute of Oncology, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.
authors.forename: Luna
authors.initials: L
authors.lastname: Kadouri
mesh_terms: D000328:Adult; D000368:Aged; D019313:BRCA1 Protein / Q000235:genetics*; D024682:BRCA2 Protein / Q000235:genetics*; D001943:Breast Neoplasms / Q000145:classification / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology; D047628:Estrogen Receptor alpha / Q000235:genetics*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D018095:Germ-Line Mutation; D006801:Humans; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology; D009367:Neoplasm Staging
chemical_list: D019313:BRCA1 Protein; C492913:BRCA1 protein, human; D024682:BRCA2 Protein; C551750:BRCA2 protein, human; C506487:ESR1 protein, human; D047628:Estrogen Receptor alpha
keywords: BRCA1; BRCA2; breast cancer; oncotype Dx; recurrence score