Gene-expression-based biomarker predicts long-term risk of breast cancer recurrence
 

A comparison of three methods of predicting the risk of recurrence in women treated for estrogen-receptor (ER)-positive breast cancer finds that only the breast cancer index (BCI) - a biomarker based on the expression levels of seven tumor-specific genes - accurately identifies patients who continue to be at risk after five years of treatment with either tamoxifen or the arom...

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