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Background: In 2014, UNICANCER (composed of 18 French Comprehensive Cancer Centers) launched the Epidemiological Strategy and Medical Economics (ESME) program to investigate real-world data in solid tumors. Real-world data give the opportunity to assess for the activity of specific drugs outside clinical trials. Eribulin is approved for pre-treated metastatic breast cancer (MBC). Marketing authorization has been granted in France in July 2012. However few data are available regarding its efficacy in real life. We evaluated eribulin use as second and third line of chemotherapy in MBC patients from the ESME database. Methods: Data from all newly diagnosed MBC patients having initiated at least one treatment between Jan. 2008 and Dec. 2014 are included in the ESME database. Data were collected retrospectively using a clinical trial-like methodology. Primary endpoint was overall survival (OS), defined from the starting date of second or third line chemotherapy (eribulin versus other chemotherapy). Progression-free survival (PFS) was calculated as a secondary endpoint. Results: Of 16,703 MBC patients included in the ESME database, 7,412 received at least 2 lines of chemotherapy: eribulin/other chemotherapy, total 1,966/5,446, second line 363/5,446, third line 654/2,669. Depending on second or third line chemotherapy use classification, median age was 59 years (range 20-97) and 58 year (range 21 – 94), triple negative tumors accounted for 20% and 19% of cases, and median follow-up reached 26 months and 22 months respectively. Table reports median OS and PFS, according to lines and type of chemotherapy. OS eribulin (months)OS other chemotherapy (months)pPFS Eribulin (months)PFS other chemotherapy (months)pSecond line12.4 (11.3-15.1)11.8 (11.3-12.3)0.4654.1 (3.7-4.9)4.1 (4.0-4.3)0.9225Third line10.3 (9.3-11.5)7.7 (7.3-8.0) Supportive analyses (using a propensity score for adjustment and as a matching factor for nested case–control analyses) and sensitivity analyses will be available for full presentation at the meeting. Conclusion: In this large-scale real-life setting, MBC patients treated with third line eribulin showed an improved OS and PFS compared with those receiving another chemotherapy. The difference was not statistically significant for second line treatment. Citation Format: Jacot W, Heudel P-E, Fraisse J, Gourgou S, Guiu S, Dalenc F, Pistilli B, Campone M, Levy C, Debled M, Leheurteur M, Chaix M, Lefeuvre C, Goncalves A, Uwer L, Ferrero J-M, Eymard J-C, Petit T, Mouret-Reynier M-A, Courtinard C, Cottu P, Robain M, Mailliez A. Real-life activity of eribulin among metastatic breast cancer patients in the multicenter national observational ESME program [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P6-14-02.

Backround: Patients with metastatic endometrial carcinoma have a poor prognosis and PIK3CA mutations and amplifications are common in these cancers. This study evaluated the efficacy and safety of the pure PI3K inhibitor BKM120 in advanced or recurrent endometrial carcinoma. Methods: This phase II, multicentre, single-arm, double strata (histological low grade (LG) or high grade (HG)) open-label study enrolled patients with histologically confirmed advanced or recurrent endometrial carcinoma who had received not more than one prior chemotherapy regimen. Patients received initially BKM120 100 mg tablets once daily. Primary end points were proportion of patients free of progression at 2 months (HG strata) or at 3 months (LG strata), objective response rate (ORR), and safety. Results: A total of 40 patients were enrolled, of whom 16 patients had received BKM120 at 100 mg. Because of high toxicities (cutaneous rash (54%), depressive events (47%), and anxiety (40%), the IDMC has proposed to stop recruitment at 100 mg and to continue the clinical trial with a lower dose of 60 mg per day. In addition, 24 patients (median age 67 years old) were newly enrolled (14 in the LG strata and 10 in the HG strata). Rate of nonprogression at 2 months in the HG strata was 70% and at 3 months was 60% in the LG strata. Median progression-free survival (PFS) for all patients is 4.5 months (CI 95% 2.8–6.1), and the median PFS for LG strata is 8.3 months compared with 3.8 months for the HG strata. No response was reported. At 60 mg per day, the most commonly reported treatment-related adverse events (AEs) were hyperglycaemia (58%), cognitive (31%), digestive (28%), hepatic liver functions (26%), and rash (23%). The most commonly reported treatment-related grade ⩾3 AEs were HTA (17%), hyperglycaemia (17%), and increased alanine aminotransferase (24%). Five patients (21%) stopped BKM120 for toxicity. Conclusions: The BKM120 was associated with an unfavourable safety profile and minimal antitumour activity in monotherapy in advanced or recurrent endometrial carcinoma. The clinical trial was stopped before end of recruitment for toxicity.

Background: Due to better molecular classification and new treatment options, epidemiology and prognosis of mBC is rapidly changing. Clinical data extracted from randomized studies are only relevant to specific subpopulations and retrospective studies are prone to selection bias. SToRM is a prospective clinical trial that aims to create a cohort of 1500 mBC patients, with the ultimate goal of identifying germ line polymorphisms associated with prognosis of breast cancer (BC) and response to treatment in the metastatic phase. Material and methods: Any newly (within 1 year) diagnosed mBC patients were eligible. Whole blood samples were drawn and germline DNA extracted for genetic analysis. Extensive epidemiologic data, disease history from primary diagnosis to metastatic spread, pathological characteristics and ER, PR and HER2 status were collected. Patients are prospectively followed until death. Genotyping using the HumanCoreExome chipset from Illumina is currently underway and will be completed in early summer 2015. Results: 1502 patients were included from March 2012 to May 2014 from 71 French institutions. Median age at metastatic relapse was 60 years (range 26-93). Median time from primary diagnosis to metastatic relapse was 30 months (range 0-473) with 24% of patients already metastatic at initial diagnosis. 78% of patients were ER+, 18% were HER2+ and only 16% were triple negative. Molecular subtype classification derived from pathological data following St Gallen consensus recommendations is presented below: n (%)Luminal A like261 (22.2%)Luminal B like HER2 negative476 (40.5%)Luminal B like HER2 positive134 (11.4%)HER2 positive non Luminal (ER-)111 (9.5%)Triple negative193 (16.4%)Missing data327 64% of the patients had received previous adjuvant treatment, among which 81% received adjuvant chemotherapy and 9% trastuzumab. At metastatic relapse, loco-regional progression, liver, lung and bone metastasis were documented in 301 (20%), 494 (33%), 410 (27%) and 1017 (68%) patients respectively. 313 patients (21%) had bone only metastatic disease. First line treatment included: chemotherapy (71%), endocrine therapy (50%) and anti-HER2 treatments (17%). Survival data will be presented at the meeting. Conclusion: Despite a theoretically better prognosis and widespread use of adjuvant hormonal treatment, ER+/HER2- breast cancer still account for more than 60% of mBC. The proportion of patients with HER2+ disease (18%) and triple negative disease (16%) is consistent with percentages observed in early BC populations. In comparison with a cohort of "cured", localized cancer, such as the SIGNAL/PHARE study, GWAS analysis will allow for the identification of genetic polymorphisms correlated with treatment resistance. Fundamentally, such variants will provide insight into the molecular mechanisms responsible for host-genetic influence on BC progression. From a clinical perspective, genetic variants that predispose to metastatic disease can serve as stratification variables in future clinical trials, particularly as the development of new treatment options for resistant BC is needed. Citation Format: Bachelot T, Lavergne E, Romieu G, Rios M, Heudel P-E, Roemer-Becuwe C, Jouannaud C, Tredan O, Chaigneau L, Arnedos M, Orfeuvre H, Petit T, Quenel-Tueux N, Jacquin J-P, Ferrero J-M, Moullet I, Abadie-Lacourtoisie S, Penault-Llorca F, Blanc E, Cox D. SToRM: A prospective clinical trial of 1502 metastatic breast cancer (mBC) patients with detail of clinical presentation, molecular subtype, treatment modalities, prognosis and GWAS genotyping. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P1-08-06.