BIG Members

Intro text: 

BIG encompasses over 50 member groups worldwide, which are breast cancer focused collaborative research groups and data centres. Some BIG groups are regional, some are national or even international.

Each member group is associated with one to several hundred member hospitals and investigators, creating a global network of thousands institutions worldwide that are working together towards one goal: better treatments for breast cancer patients... and ultimately finding a cure.




Breast Gynaecological International Cancer Society 


Breast Intergroup of Eastern India 
Breast Disease Professional Committee of CMEA 
Cancer Therapeutics Research Group 
Hong Kong Breast Oncology Group 
Indian Co-operative Oncology Network 
Indian Oncology Study Group 
Japan Breast Cancer Research Group 
Korean Cancer Study Group 
Shaukat Khanum Memorial Cancer Hospital & Research Centre 
Taiwan Cooperative Oncology Group 
Thai Society of Clinical Oncology 


Breast Cancer Trials Australia and New Zealand 
Trans-Tasman Radiation Oncology Group 


Austrian Breast & Colorectal Cancer Study Group 
Arbeitsgemeinschaft Gynäkologische Onkologie Breast Study Group 
Borstkanker Onderzoek Groep 
Central and East European Oncology Group 
Cancer Trials Ireland 
Danish Breast Cancer Cooperative Group 
European Organisation for Research and Treatment of Cancer Breast Cancer Group 
Finnish Breast Cancer Group 
Georgian Cancer Study Group 
Spanish Breast Cancer Group 
Gruppo Oncologico Italiano di Ricerca Clinica 
Hellenic Society of Breast Surgeons 
Hellenic Cooperative Oncology Group 
Hellenic Oncology Research Group 
Icelandic Breast Cancer Group 
International Breast Cancer Study Group 
International Breast Cancer Intervention Studies 
International Collaborative Cancer Group 
Institute of Cancer Research - Clinical Trials & Statistics Unit 
Institut Jules Bordet Clinical Trials Support Unit (formerly BrEAST) 
Fondazione Michelangelo 
Norwegian Breast Cancer Group 
National Cancer Research Institute - Breast Cancer Clinical Studies Group 
Swedish Association of Breast Oncologists 
Swiss Group for Clinical Cancer Research 
Société Luxembourgeoise d’Oncologie 
Breast Cancer Research Group 
SUCCESS Study Group 
Swedish Breast Cancer Group 
Unicancer Breast Group 
Westdeutsche Studiengruppe 
EUropean Breast Cancer Research Association of Surgical Trialists (EUBREAST) e.V. 
EUropean Breast Cancer Research Association of Surgical Trialists (EUBREAST) ETS  
Gruppo Italiano Mammella 

Latin America

Grupo Argentino de Investigación Clínica en Oncología 
Grupo de Estudios Clinicos Oncologicos Peruano 
Chilean Cooperative Group for Oncologic Research 
Grupo Oncológico Cooperativo Uruguayo 
Latin American Cooperative Oncology Group 

Middle East

Israeli Breast Group 
Iranian Cancer Research Center 
Sheba Breast Collaborative Group 

North America

Canadian Cancer Trials Group