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1077 Background: In MBC, positive HR constitute a favourable prognostic factor and predict response to an hormonal therapy. Conversely HER-2 overexpression is an adverse prognostic factor associated with a more aggressive tumor. In this retrospective study we analysed overall survival (OS) and disease-free interval (DFI) of three phenotypes: HR-/HER-2- (triple negative); HR+/HER-2- (luminal) and HER-2 overexpression (HER-2+). Methods: We evaluated 511 patients with a MBC treated at Centre Jean Perrin from 1973 to 2006. A comparative lecture of oestrogenic, progestative and HER-2 receptors was performed by IHC. At present, HR and HER-2 status were re-evaluated on 166 initial tumor sample of this data base by two pathologists (study currently ongoing). Median age of patients was 54.8 years. 120 (23.6%) patients were directly metastatic (M1), 391 (76.4%) relapsed distantly (M0). Metastatic patients received a median number of 2 lines of chemotherapy (range, 0–14) and/or a median number of 1 line (range, 0–8) of hormonotherapy. 92 (55.4%) patients had a luminal phenotype, 48 patients (28.9%) were HER-2+ and 26 patients (15.7%) were triple negative. Results: Among these 166 tumors, OS was significantly different between these three populations (p=0.00056). DFI variation was not signicant (p=0.083). These data showed that: - Luminal phenotype had the better OS (median survival of 36.5 months) and DFI (51.09 months) - HER-2+ phenotype (33 of 48 patients were treated with trastuzumab from 1999) had an intermediate prognostic on OS (median survival of 31.1 months) and DFI (42.2 months) - Triple negative phenotype had a poor prognostic on OS (median survival of 12.8 months) and the worse DFI (32.64 months) Conclusions: In metastatic breast cancer, luminal phenotype patients had the best OS; HER-2+ phenotype (treated by herceptin) had an intermediate OS, and triple negative phenotype had the worse OS. No significant financial relationships to disclose.

Radiation therapy has become one of the safest and most effective methods for treating cancer. Over half of all cancer patients undergo radiotherapy, either as the sole treatment technique or combined with other therapies. As technologies evolve and improve, radiotherapy techniques become increasingly sophisticated, requiring more time and skill to ensure delivery as prescribed. Such is the increasing complexity of treatments that technology providers are trying to keep up with demand for more and more advanced computing power to manage the need for immensely precise and powerful tools. Today the need for oncology information systems and electronic medical records is paramount in providing the tools for image management, data and workflow control supporting individual patient demographics, treatment planning, delivery and follow-up.

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