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JOURNAL ARTICLE

"BRCAness" syndrome in ovarian cancer: a case-control study describing the clinical features and outcome of patients with epithelial ovarian cancer associated with BRCA1 and BRCA2 mutations

David S P Tan, Christian Rothermundt, Karen Thomas, Elizabeth Bancroft, Rosalind Eeles, Susan Shanley, Audrey Ardern-Jones, Andrew Norman, Stanley B Kaye, Martin E Gore
Journal of Clinical Oncology 2008 December 1, 26 (34): 5530-6
18955455

PURPOSE: We evaluated the clinical impact of germ-line BRCA1/2 mutations in patients with epithelial ovarian cancer (EOC) on responses to first and subsequent lines of chemotherapy, treatment-free interval (TFI) between each line of therapy, and overall survival (OS).

PATIENTS AND METHODS: Twenty-two EOC patients with germ-line BRCA1 or BRCA2 mutations (BRCA-positive) were selected from our database and matched (1:2) with 44 nonhereditary EOC controls (defined by no associated personal history of breast cancer and no family history of breast and ovarian cancer or an uninformative BRCA mutation test) for stage, histologic subtype, age, and year of diagnosis. All patients received primary platinum-based chemotherapy. Statistical comparisons included responses after first-, second-, and third-line treatment (chi(2)/Fisher's exact test) and median OS (Kaplan-Meier method/log-rank test).

RESULTS: Compared with controls, BRCA-positive patients had higher overall (95.5% v 59.1%; P = .002) and complete response rates (81.8% v 43.2%; P = .004) to first line treatment, higher responses to second and third line platinum-based chemotherapy (second line, 91.7% v 40.9% [P = .004]; third line, 100% v 14.3% [P = .005]) and longer TFIs. A significant improvement in median OS in BRCA-positive patients compared with controls was observed from both time of diagnosis (8.4 v 2.9 years; P < .002) and time of first relapse (5 v 1.6 years; P < .001). BRCA status, stage, and length of first response were independent prognostic factors from time of first relapse.

CONCLUSION: BRCA-positive EOC patients have better outcomes than nonhereditary EOC patients. There exists a clinical syndrome of BRCAness that includes serous histology, high response rates to first and subsequent lines of platinum-based treatment, longer TFIs between relapses, and improved OS.

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