273P - External validation of Modified Breast Graded Prognostic Assessment for breast cancer patients with brain metastases

Date 11 September 2017
Event ESMO 2017 Congress
Session Poster display session
Topics Breast Cancer, Metastatic
Breast Cancer
Presenter Gaia Griguolo
Citation Annals of Oncology (2017) 28 (suppl_5): v74-v108. 10.1093/annonc/mdx365
Authors G. Griguolo1, W. Jacot2, E. Kantelhardt3, M.V. Dieci1, C. Bourgier4, C. Thomssen5, C. Bailleux6, F. Miglietta1, A.L. Braccini7, P.F. Conte1, J. Ferrero8, V. Guarneri1, A. Darlix2
  • 1Department Of Surgery, Oncology And Gastroenterology, University of Padova, 35128 - Padova/IT
  • 2Department Of Medical Oncology, ICM Regional Cancer Institute of Montpellier, 34298 - Montpellier/FR
  • 3Department Of Gynaecology And Institute Of Medical Epidemiology, Biostatistics And Informatics, Martin Luther University Halle-Wittenberg, 06097 - Halle/DE
  • 4Department Of Radiation Oncology, ICM Regional Cancer Institute of Montpellier, 34298 - Montpellier/FR
  • 5Department Of Gynaecology, Martin-Luther University Halle-Wittenberg, 06120 - Halle (Saale)/DE
  • 6Department Of medical Oncology, Centre Antoine Lacassagne, 6100 - Nice/FR
  • 7Department Of Medical Oncology And Radiotherapy, Centre Azuréen de Cancérologie, 06250 - Mougins/FR
  • 8Department Of medical Oncology, Centre Antoine Lacassagne, 06100 - Nice/FR

Abstract

Background

Several prognostic indexes have been developed to estimate survival of breast cancer (BC) patients with brain metastases (BM). The Modified Breast Graded Prognostic Assessment (GPA) has been proposed as refinement of the Breast GPA, based on a single-institution cohort of 1,552 patients. In addition to age, tumor subtype and Karnofsky PS, the modified breast GPA comprises number of BM. The aim of this study is to validate the modified breast-GPA in an external multinational cohort.

Methods

Clinical and biological data of 668 BC patients diagnosed with BM at four European institutions between 1996 and 2016 were reviewed. Patients were classified according to breast GPA and modified breast GPA. OS was calculated from time of BM diagnosis to death or last follow up. Cox proportional models were used to calculate Hazard Ratio and 95% Confidence Intervals (CI). Performances of breast-GPA and modified breast-GPA were compared using Harrell's concordance index.

Results

At last follow-up, 632 patients (94.6%) had died. Median OS was 8.1 months (95% CI 6.9-9.4 months). Median age at BM diagnosis was 56 years (range 24-85). Tumor phenotype distribution was: triple negative (20.1%), hormone receptor (HR)-HER2 + (21.6%), HR+HER2 + (20.4%) and HR+HER2- (33.4%). KPS distribution was: 90-100 (19.6%), 70-80 (49.0%), 60 (12.8%) and ≤50 (18.6%). 355 patients (53.5%) had >3 BM. Number of BM (1,2,3,>3) was significantly associated with OS (p 

Conclusions

Number of BM is a significant prognostic factor in BC patients with BM and modified breast-GPA performs better than breast-GPA in predicting prognosis of these patients.

Clinical trial identification

Legal entity responsible for the study

Department of Surgery, Oncology and Gastroenterology, University of Padova, Padua, Italy

Funding

None

Disclosure

All authors have declared no conflicts of interest.