Women with early-stage breast cancer who had microscopic metastases in the lymph nodes or bone marrow fared as well as women who didn't, researchers reported in the Journal of the American Medical Association. The study didn't find a statistically significant difference in the five-year survival rates of women who had the micrometastases and those who didn't. The study means two tests for micrometastases considered to be predictors of survival are meaningless, researchers said.

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