Abstract P5-21-09: Overall survival of metastatic breast cancer patients – data from the PRAEGNANT breast cancer registry
Authors: Taran F-A , Fasching PA , Volz B , Huober J , Overkamp F , Kolberg HC , Hadji P , Tesch H , Haeberle L , Ettl J , Lux MP , Hartkopf AD , Lueftner D , Wallwiener M , Müller V , Beckmann MW , Belleville E , Wimberger P , Hielscher C , Geberth M , Fersis N , Abenhardt W , Kurbacher C , Wuerstlein R , Thomssen C , Untch M , Janni W , Fehm TN , Wallwiener D , Brucker SY , Schneeweiss A 
Published: February 2018

Abstract
Background
Breast Cancer registries can help to understand how patient groups are treated outside clinical trials and what outcome is to expected for specific patient groups and therapy lines, which are not included into clinical trials. Here we present overall survival data according to therapy lines, patient and tumor characteristics.
Methods
The PRAEGNANT metastatic breast cancer registry (NCT02338167) is a prospective registry for breast cancer patients with focus on molecular biomarkers. Patients of all therapy lines with any kind of treatment are eligible for this registry. Collected data comprises therapies, adverse events, quality of life and other patient reported outcomes. Here we report on the comparison of overall survival data for different patient groups. For that analysis was restricted to patients included in the first therapy line for subgroup comparisons. Only for the analysis of the effect of therapy line on overall survival the complete dataset was used.
Results
A total of 1854 patients took part in this analysis. Of those 1016 were included first line, and 340, 213 and 285 patients 2nd line, 3rd lin4 and 4th line or higher respectively. A total of 339 deaths were observed. Two year survival rates (2Y-OS) for these groups were 75%, 65%, 57% and 36% (p(log-rank)&lt;0.001). All further analyses were done only for the subset of first line treated patients with a total of 127 events. HER2 positive patients had the highest 2Y-OS rate of 84% and TNBC had the worst with 60% (see figure 1). Absolute numbers of deaths for TNBC, luminal A like, luminal B like and HER2 posives were 21, 48, 25, and 21. According to metastastic pattern the following survival rates were seen: brain (48%), other locations (69%), visceral (78%) and bone only (81%). ECOG was another factor that had a large influence on OS with ECOG 0: 83%, ECOG 1: 67% and EGOG 2+: 63% 2Y-OS. Age, BMI, number of concomitant diseases, and primary metastatic status did not have an influence on 2Y-OS.
Conclusion
This breast registry included patients over all therapy lines however mainly during the 1st line of therapy. Simple patient and tumor characteristics can classify patients into patients with differently favourable prognosis. Patients with HER2 positive disease had the best overall survival, while TNBC and luminal B like patients had the worst prognosis. As most of the patients were luminal A like 43% of all deaths occured within the group of luminal A like patients, which will need further focus for therapy development in the future.
Citation Format: Taran F-A, Fasching PA, Volz B, Huober J, Overkamp F, Kolberg HC, Hadji P, Tesch H, Haeberle L, Ettl J, Lux MP, Hartkopf AD, Lueftner D, Wallwiener M, Müller V, Beckmann MW, Belleville E, Wimberger P, Hielscher C, Geberth M, Fersis N, Abenhardt W, Kurbacher C, Wuerstlein R, Thomssen C, Untch M, Janni W, Fehm TN, Wallwiener D, Brucker SY, Schneeweiss A. Overall survival of metastatic breast cancer patients – data from the PRAEGNANT breast cancer registry [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 P5-21-09.