The WECARE Study Collaborative Group

Risk Factors for Estrogen Receptor Subtype‐Specific Contralateral Breast Cancer in Women Under Age 55 Years

Women with estrogen receptor negative (ER-) contralateral breast cancer (CBC) are 50% more likely to die of CBC compared to women with estrogen receptor positive (ER+) CBC. We comprehensively investigated risk factors for ER subtype-specific CBC using the Women's Environmental Ca...