Authors: Olivia Pagani Shari Gelber Edda Simoncini Monica CastiglioneGertsch Karen N Price Richard D Gelber Stig B Holmberg Diana Crivellari John Collins Jurij Lindtner Beat Thürlimann Martin F Fey Elizabeth Murray John F Forbes Alan S Coates Aron Goldhirsch for the International Breast Cancer Study Group
Publish Date: 2008/10/25
Volume: 116, Issue: 3, Pages: 491-500
Abstract
To compare the efficacy of chemoendocrine treatment with that of endocrine treatment ET alone for postmenopausal women with highly endocrine responsive breast cancer In the International Breast Cancer Study Group IBCSG Trials VII and 12–93 postmenopausal women with nodepositive estrogen receptor ERpositive or ERnegative operable breast cancer were randomized to receive either chemotherapy or endocrine therapy or combined chemoendocrine treatment Results were analyzed overall in the cohort of 893 patients with endocrineresponsive disease and according to prospectively defined categories of ER age and nodal status STEPP analyses assessed chemotherapy effect The median followup was 13 years Adding chemotherapy reduced the relative risk of a diseasefree survival event by 19 P = 002 compared with ET alone STEPP analyses showed little effect of chemotherapy for tumors with high levels of ER expression P = 007 or for the cohort with one positive node P = 003 Chemotherapy significantly improves diseasefree survival for postmenopausal women with endocrineresponsive breast cancer but the magnitude of the effect is substantially attenuated if ER levels are highWe thank the patients physicians nurses and data managers who have participated in the International Breast Cancer Study Group see Appendix trials now and for the past 30 years The IBCSG is funded in part by Swiss Group for Clinical Cancer Research SAKK Frontier Science and Technology Research Foundation FSTRF The Cancer Council Australia Australian New Zealand Breast Cancer Trials Group National Health Medical Research Council National Cancer Institute CA75362 Swedish Cancer Society Cancer Research Switzerland/Oncosuisse Cancer Association of South Africa Foundation for Clinical Cancer Research of Eastern Switzerland OSKKMembers from 1998 to 2008 S Aebi A S Coates M Colleoni J P Collins H Cortés Funes R D Gelber A Goldhirsch M Green A Hiltbrunner S B Holmberg P Karlsson I Kössler I Láng J Lindtner F Paganetti M de Stoppani CM Rudenstam HJ Senn R Stahel B Thürlimann A Veronesi
Keywords: