NEW YORK (GenomeWeb News) â€" In a pair of papers appearing online today in the Lancet and Lancet Oncology, members of the Breast Cancer Intergroup of North America reported that some post-menopausal, estrogen receptor positive breast cancer patients benefit from the addition of chemotherapy to standard tamoxifen treatment.

And, the researchers found, the addition of chemotherapy was most beneficial for individuals scoring high on Genomic Health's Oncotype DX test, suggesting the recurrence assay may be helpful for guiding such treatment.

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